What causes a sound wave to travel?
A
An object vibrates, and those vibrations carry air in all directions as transverse waves.

B
An object vibrates, and those vibrations carry air in all directions as longitudinal waves.

Answered Incorrectly
C
An object vibrates, and those vibrations travel through air in one direction as a transverse wave.

D
An object vibrates, and those vibrations travel through air in one direction as longitudinal waves.

I choose B. but B. was incorrect so what is the answer?