499The essential body movements for a motorcycle rider on a mountain road is to use the right hand as the main control for the throttle, and maintain the rear wheel force when turning around a curve,
(A)move the hips before turning and lean in the same direction as the vehicle
(B)relax the left shoulder, elbow and wrist when turning left, and relax the right shoulder, elbow and wrist when turning right
(C)all of the above.