4. II. Below are lists of different activities. Which of the following show ways to reduce friction?
I. Applying floor wax on the floor. II.Driving on a cemented road
III. Applying lubricants on the bicycle.
IV. Driving on a bumpy road.
A. I, II, IV
B. I, II, III ,
C. II, III, IV
D. I, II, III, IV ​