Four students at a concert notice a balloon near the large speakers moving slightly towards, then away from the speaker during the low-frequency passages. The four students explain this phenomenon . Student A: The wave is a longitudinal wave because sound is made by regions of air being slightly more compressed followed by regions that are slightly less compressed.

Student B: The wave is a transverse wave because sound is made by regions of air being slightly more compressed followed by regions that are slightly less compressed.

Student C: The wave is a longitudinal wave because sound is made by regions of air moving perpendicular to the sound wave.

Student D: The wave is a transverse wave because sound is made by regions of air moving perpendicular to the sound wave

Which student correctly identifies the correct wave type and reason behind the balloons movement? (DOK 2)

A. Student B

B. Student A

C. Student D

D. Student C