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?