Given the question: Information:  - The Fiat Idea ( Type 350 ) is a mini MPV built by the Italian manufacturer Fiat since 2003 . The car is based on the B ( Project 188 ) platform , originally used for the second - generation Fiat Punto . The Idea is noted for its versatile interior , which includes sliding and folding rear seats . In 2006 the Idea had a facelift with the main changes being a darker interior , chrome grill and clear front indicators .  - A van is a type of road vehicle used for transporting goods or people. Depending on the type of van it can be bigger or smaller than a truck and SUV, and bigger than a common car. There is some varying in the scope of the word across the different English-speaking countries. The smallest vans, minivans, are commonly used for transporting people from a family. Larger vans with passenger seats are used for institutional purposes, such as transporting students. Larger vans with only front seats are often used for business purposes, to carry goods and equipment. Specially-equipped vans are used by television stations as mobile studios. Postal services and courier companies use large step vans to deliver packages.  - A compact MPV is a car classification used in Europe to describe multi-purpose vehicle versions of small family cars (sometimes also referred to as "compact cars"), fitting between the mini MPV and large MPV sub-segments. In Japan, the term "space wagon" is sometimes used to refer to this type of vehicle.  - Mini MPV (short for mini multi-purpose vehicle) is a car classification used in some countries to describe superminis or subcompacts which have taller build and often with a flexible interior layout, fitting below the compact MPV and large MPV/Minivan classifications. MPV stands for multi-purpose vehicle, although the full name is rarely used. The term Leisure Activity Vehicle (LAV) is sometimes used for van based MPVs, but this marketing term is largely ignored by the press, normally using the term MPV.  - Supermini (also called B-segment across Europe) is a class of automobile larger than a city car but smaller than a small family car.  - Governments and private organizations have developed car classification schemes that are used for innumerable purposes including regulation, description and categorization, among others. This article details commonly used classification schemes in use worldwide.    After reading the paragraphs above, we are interested in knowing the entity with which 'fiat idea' exhibits the relationship of 'series'. Find the answer from the choices below.  Choices: - car classification  - cars  - city car  - postal  - supermini
The answer is:
supermini