In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
Q: Context: A motor vehicle is a self-propelled road vehicle and off-road vehicle, commonly wheeled, that does not operate on rails, such as trains or trams and used for commercial purposes on the highways in the transportation of passengers, or passengers and property., Kurtis Roberts is a motorcycle road racer , born on 17 November 1978 in Turlock , California . He is the youngest son of three - time 500cc World Champion Kenny Roberts , and the younger brother of 2000 500cc World Champion Kenny Roberts , Jr. . He has raced in most major US and international motorcycle racing championships , in both Grand Prix and Superbike categories ., A motorcycle (also called a motorbike, bike, or cycle) is a two- or three-wheeled motor vehicle. Motorcycle design varies greatly to suit a range of different purposes: long distance travel, commuting, cruising, sport including racing, and off-road riding. Motorcycling is riding a motorcycle and related social activity such as joining a motorcycle club and attending motorcycle rallies., Kenneth Leroy Roberts (born December 31, 1951 in Modesto, California) is an American former professional motorcycle racer and racing team owner. In 1978, he became the first American to win a Grand Prix motorcycle racing world championship. He was also a two-time winner of the A.M.A. Grand National Championship. Roberts is one of only four riders in American Motorcyclist Association (AMA) racing history to win the AMA Grand Slam, representing Grand National wins at a mile, half-mile, short-track, TT Steeplechase and road race events., Subject: kurtis roberts, Relation: occupation, Options: (A) commercial (B) motorcycle racer (C) travel
A:
motorcycle racer