Here's a problem to solve: Which land form is the result of the constructive force of a glacier?

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

- A: valleys carved by a moving glacier
 
- B: piles of rocks deposited by a melting glacier
 
- C: grooves created in a granite surface by a glacier
 
- D: bedrock hills roughened by the passing of a glacier
 