Carla pushes a toy car and lets it go. The toy car rolls and gradually comes to a stop. What would make the car stop?

A. A force must be applied to the car in the direction opposite to that in which it is moving.
B. A force must be applied pushing the car forward in the same direction as the moving car.
C. A force must be applied in a direction pushing the car upward to make the car stop.
D. A force must be applied in a direction pulling the car downward causing the car to stop.