Here's a problem to solve: What are two ways ice can change Earth's surface?

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

- A: cracking a rock and making a U-shaped valley
 
- B: making a dune and making a U-shaped valley
 
- C: making a dune and making a V-shaped valley
 
- D: cracking a rock and making a V-shaped valley
 