Sound Waves Induce Movements of the Hair Cells of the Organ

Sound waves induce movements of the hair cells of the organ of Corti via

A) movement of the basilar membrane relative to the tectorial membrane.
B) movement of the scala tympani.
C) movement of the malleus against the round window.
D) movement of the stapes against the round window.
E) contraction of the muscle fibers within the middle ear.