To maintain adequate control of the motorcycle, your arms should be positioned:

By keeping your arms positioned with elbows slightly bent, you are able to maintain flexibility and control of the motorcycle. Having your arms straight (A) would make it difficult to maneuver and also cause undue strain on your arms. Bent upwards (B) is also incorrect as it would cause your arms to fatigue quickly and hinder your ability to effectively control the motorcycle. Locked out (D) is also incorrect as it refers to having your arms fully extended, which would make it difficult to make quick and precise movements on the motorcycle. Elbows slightly bent (C) strikes the perfect balance between flexibility and control, allowing you to comfortably handle the motorcycle while maintaining stability.