How does the music change from the first clip to the second clip to the third clip?

a. Each time the pitch is the same but the music becomes louder.
b. Each time the pitch gets lower and the music grows louder.
c. Each time the pitch is higher and the music grows louder.
d. Each time the pitch gets lower and the music grows softer.

ANS: Each time the pitch is higher and the music grows louder