Here's a problem to solve: As a heavy metal ball rolls down a hill, it goes faster and faster. Which statement is true?

Among the 4 following options, which is the correct answer?

- A: The ball's potential energy is changing to kinetic energy.
 
- B: The ball is gaining potential energy from the hill.
 
- C: The ball is rapidly losing kinetic energy as it rolls down the hill.
 
- D: The ball will continue gaining kinetic energy until it stops.
 