Information:  - Greensboro (formerly Greensborough) is a city in the U.S. state of North Carolina. It is the third-largest city by population in North Carolina and the county seat and largest city in Guilford County and the surrounding Piedmont Triad metropolitan region. As of the 2010 census, the city population was 269,666, and in 2015 the estimated population was 285,342. Three major interstate highways (Interstate 85, Interstate 40 and Interstate 73) in the Piedmont region of central North Carolina were built to intersect at this city.  - Macungie (pronounced ma-CUN-gee) is the second oldest borough in Lehigh County, Pennsylvania, United States and a suburb of Allentown, Pennsylvania in the Lehigh Valley region. Macungie is included in the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area, which is also included in the New York City-Newark, New Jersey, NY-NJ-CT-PA Combined Statistical Area.  - The Volvo Group (legally Aktiebolaget Volvo, shortened to AB Volvo) (stylised as VOLVO) is a Swedish multinational manufacturing company headquartered in Gothenburg. While its core activity is the production, distribution and sale of trucks, buses and construction equipment, Volvo also supplies marine and industrial drive systems and financial services. Although the two firms are still often conflated, Volvo Cars, also based in Gothenburg, is owned by Geely Holding Group a Chinese multinational automotive manufacturing company and has been a totally separate company since it was sold to the Ford Motor Company in 1999. The companies still share the Volvo logo and co-operate in running the Volvo Museum.  - A truck (United States, Canada, Australia, New Zealand, Puerto Rico and Pakistan; also called a lorry in the United Kingdom, Ireland, South Africa, Malaysia, Singapore, and India) is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration; smaller varieties may be mechanically similar to some automobiles. Commercial trucks can be very large and powerful, and may be configured to mount specialized equipment, such as in the case of fire trucks and concrete mixers and suction excavators.  - Mack Trucks, Inc., is an American truckmanufacturing company and a former manufacturer of buses and trolley buses. Founded in 1900 as the Mack Brothers Company, it manufactured its first truck in 1907 and adopted its present name in 1922. Mack Trucks is a subsidiary of AB Volvo which purchased Mack along with Renault Trucks in 2000. After being founded in Brooklyn, New York, the company's headquarters were in Allentown, Pennsylvania, from 1905 to 2009, when they moved to Greensboro, North Carolina. The entire line of Mack products is still produced in Macungie, Pennsylvania, with additional assembly plants in Pennsylvania, Maryland, Australia, and Venezuela.  - Allentown (Pennsylvania Dutch: "Allenschteddel") is a city located in Lehigh County, Pennsylvania, United States. It is Pennsylvania's third most populous city and the 224th largest city in the United States. As of the 2010 census, the city had a total population of 118,032 and is currently the fastest growing city in all of Pennsylvania. It is the largest city in the metropolitan area known as the Lehigh Valley, which had a population of 821,623 residents . Allentown constitutes a portion of the New York City Metropolitan Area and is the county seat of Lehigh County. In 2012, the city celebrated the 250th anniversary of its founding in 1762.  - Groupe Renault is a French multinational automobile manufacturer established in 1899. The company produces a range of cars and vans, and in the past has manufactured trucks, tractors, tanks, buses/coaches and autorail vehicles.  - A bus (archaically also omnibus, multibus, motorbus, autobus) is a road vehicle designed to carry many passengers. Buses can have a capacity as high as 300 passengers. The most common type of bus is the single-decker rigid bus, with larger loads carried by double-decker and articulated buses, and smaller loads carried by midibuses and minibuses; coaches are used for longer-distance services. Many types of buses, such as city transit buses and inter-city coaches, charge a fare. Other types, such as elementary or secondary school buses or shuttle buses within a post-secondary education campus do not charge a fare. In many jurisdictions, bus drivers require a special licence above and beyond a regular driver's licence.  - The Mack F series was the third generation of cabover trucks from Mack Trucks . Its production began in 1962 and ended in 1981 . It was produced primarily as a set - forward axle truck but a setback axle version was shipped overseas ( from the USA ) . The cab came in a 50 inch ( 1371.6 mm ) day cab ( no sleeper ) . Sleeper models included a 72 inch ( 1828.8 mm ) , 80 inch ( 2032 mm ) and later a `` bustle back '' was added that lengthened the sleeper to 86 inches ( 2184.4 mm ) .  - Renault Trucks is a French commercial truck and military vehicle manufacturer with corporate headquarters at Saint-Priest near Lyon. Originally part of Renault, it has been owned by the Volvo Group since 2001.    After reading the paragraphs above, we are interested in knowing the entity with which 'mack f series' exhibits the relationship of 'subclass of'. Find the answer from the choices below.  Choices: - area  - automobile  - borough  - bus  - case  - census  - city  - configuration  - construction equipment  - distance  - dutch  - french  - group  - line  - logo  - manufacturing  - metropolitan area  - military  - military vehicle  - motor vehicle  - power  - priest  - production  - road vehicle  - saint  - school  - second  - secondary education  - secondary school  - single  - state  - swedish  - third  - transport  - truck  - type  - vehicle
The answer to this question is:
automobile