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

### Question:
Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

### Choices:
A. ball with a mass of 5 kg
B. ball with a mass of 10 kg
C. ball with a mass of 15 kg
D. ball with a mass of 20 kg

### Answer:
