Answer the following question: Information:  - Bookkeeping is the recording of financial transactions, and is part of the process of accounting in business. It is the only word in the English language with three consecutive groups of a repeating letter. Transactions include purchases, sales, receipts, and payments by an individual person or an organization/corporation. There are several standard methods of bookkeeping, such as the single-entry bookkeeping system and the double-entry bookkeeping system, but, while they may be thought of as "real" bookkeeping, any process that involves the recording of financial transactions is a bookkeeping process.  - A single-entry bookkeeping system or single-entry accounting system is a method of bookkeeping relying on a one sided accounting entry to maintain financial information.  - Management (or managing) is the administration of an organization, whether it be a business, a not-for-profit organization, or government body. Management includes the activities of setting the strategy of an organization and coordinating the efforts of its employees or volunteers to accomplish its objectives through the application of available resources, such as financial, natural, technological, and human resources. The term "management" may also refer to the people who manage an organization.  - An investor allocates capital with the expectation of a future financial return. Types of investments include: equity, debt securities, real estate, currency, commodity, derivatives such as put and call options, futures, forwards, etc. This definition makes no distinction between those in the primary and secondary markets. That is, someone who provides a business with capital and someone who buys a stock are both investors. An investor who owns a stock is a shareholder.  - Accounting or accountancy is the measurement, processing and communication of financial information about economic entities such as businesses and corporations. The modern field was established by the Italian mathematician Luca Pacioli in 1494. Accounting, which has been called the "language of business", measures the results of an organization's economic activities and conveys this information to a variety of users, including investors, creditors, management, and regulators. Practitioners of accounting are known as accountants. The terms "accounting" and "financial reporting" are often used as synonyms.  - A creditor is a party (e.g. person, organization, company, or government) that has a claim on the services of a second party. It is a person or institution to whom money is owed. The first party, in general, has provided some property or service to the second party under the assumption (usually enforced by contract) that the second party will return an equivalent property and service. The second party is frequently called a debtor or borrower. The first party is the creditor, which is the lender of property, service or money.  - A business (also known as an enterprise, a company or a firm) is an organizational entity involved in the provision of goods and services to consumers. Businesses as a form of economic activity are prevalent in capitalist economies, where most of them are privately owned and provide goods and services to customers in exchange for other goods, services, or money. Businesses may also be social non-profit enterprises or state-owned public enterprises charged by governments with specific social and economic objectives. A business owned by multiple individuals may form as an incorporated company or jointly organise as a partnership. Countries have different laws that may ascribe different rights to the various business entities.  - Counting is the action of finding the number of elements of a finite set of objects. The traditional way of counting consists of continually increasing a (mental or spoken) counter by a unit for every element of the set, in some order, while marking (or displacing) those elements to avoid visiting the same element more than once, until no unmarked elements are left; if the counter was set to one after the first object, the value after visiting the final object gives the desired number of elements. The related term "enumeration" refers to uniquely identifying the elements of a finite (combinatorial) set or infinite set by assigning a number to each element. Counting sometimes involves numbers other than one; for example, when counting money, counting out change, "counting by twos" (2, 4, 6, 8, 10, 12, ...), or "counting by fives" (5, 10, 15, 20, 25, ...).  - An accountant is a practitioner of accounting or accountancy, which is the measurement, disclosure or provision of assurance about financial information that helps managers, investors, tax authorities and others make decisions about allocating resource(s).   - A corporation is a company or group of people authorized to act as a single entity (legally a person) and recognized as such in law. Early incorporated entities were established by charter (i.e. by an "ad hoc" act granted by a monarch or passed by a parliament or legislature). Most jurisdictions now allow the creation of new corporations through registration.  - Fra Luca Bartolomeo de Pacioli (sometimes "Paccioli" or "Paciolo"; 14471517) was an Italian mathematician, Franciscan friar, collaborator with Leonardo da Vinci, and a seminal contributor to the field now known as accounting. He is referred to as "The Father of Accounting and Bookkeeping" in Europe and he was the first person to publish a work on the double-entry system of book-keeping in this continent. He was also called Luca di Borgo after his birthplace, Borgo Sansepolcro, Tuscany.  - A receipt is a written acknowledgment that a specified article or payment has been received. A receipt records the sale of goods or provision of a service. If the recipient of the payment is required to collect a tax from the customer, the amount collected would also be included on the receipt and the amount would be deemed to have been collected on behalf of the relevant government tax authority. In many countries a retailer is required to include the tax and similar amounts in the price of goods sold. Similarly, amounts may be deducted from amounts payable, as in the case of wage withholding taxes. On the other hand, tips or other gratuities given by a customer, for example in a restaurant, would not form part of the payment amount. In some countries, it is obligatory for a business to provide a receipt to a customer confirming the details of a transaction. In most cases the recipient of money provides the receipt, but in some cases the receipt is generated by the payer, as in the case of goods returned to a store for a refund. A receipt is not the same as an invoice.  - Double - entry bookkeeping , in accounting , is a system of bookkeeping so named because every entry to an account requires a corresponding and opposite entry to a different account . For instance , recording earnings of $ 100 would require making two entries : a debit entry of $ 100 to an account called `` Cash '' and a credit entry to an account called `` Income . ''    After reading the paragraphs above, we are interested in knowing the entity with which 'double-entry bookkeeping system' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - 12  - 25  - account  - action  - activity  - administration  - application  - article  - capital  - case  - change  - communication  - company  - corporation  - counter  - credit  - creditor  - currency  - enterprise  - estate  - exchange  - field  - government  - information  - language  - legislature  - measurement  - number  - organization  - parliament  - part  - party  - payment  - person  - process  - profit  - restaurant  - retailer  - rights  - service  - set  - single  - standard  - store  - system  - three  - word
Answer:
activity