A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
A teacher puts a cup of coffee into the cup holder of a car. When the car stops suddenly some of the coffee spills out of the cup. Which statement best explains why the coffee spills?

### Choices:
A. The coffee stays in motion because the stopping force acts only on the car.
B. The coffee stays in motion because a force from the cup holder pulls on the coffee.
C. The stopping force on the car causes an equal and opposite reaction from the coffee.
D. The stopping force causes the motion of the car to slow down and the motion of the coffee to speed up.

### Answer:
