Question: Sam builds a ramp and lets a toy car roll down. Which describes the energy of the car as it rolls down the ramp?

  Options: 
 A. The kinetic energy and the potential energy both increase.
 B. The kinetic energy and the potential energy both decrease.
 C. The kinetic energy increases and the potential energy decreases.
 D. The kinetic energy decreases and the potential energy increases. 
Answer: C