Here's a problem to solve: A sound is heard when you pluck a string on a guitar. What will happen to the sound if the same string is plucked harder?

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

- A: The volume will stay the same, and the pitch will be higher.
 
- B: The pitch will stay the same, and the volume will be higher.
 
- C: Both the pitch and the volume will be higher.
 
- D: Both the pitch and the volume will stay the same.
 