Which example best illustrates kinetic energy?

A. A car parked on top a hill
B. A book on top of a book shelf
C. A comet that is flying through space
D. A pencil laying down on a desk

A.

Explanation:

In all actuality. The car may not be fully moving but since it's on a hill and the earth moves it makes the most sense. Also since the car is at a slope by the law of motion what goes up must come down so the car is in fact moving.

c. newton's third law of motion