Task: Question Answering
Input (English): In which of the following cases would a decrease in friction be most beneficial?  
 (A) the friction between the shoes of a jogger and the jogging track (B) the friction between the wheels of a car and the surface of a road (C) the friction between a rotating pulley and the axle that supports the pulley (D) the friction between a rotating pulley and the rope that is used with the pulley
Output (English): C