As Hearing Takes Place, an Electrical Signal Is Created from the Physical

Multiple Choice

As hearing takes place, an electrical signal is created from the physical signal of the sound waves, eventually sending nerve impulses to the brain via the auditory nerve. What actually causes the electrical signal to be formed?

A) Bending of the hair cells in the organ of Corti by the basilar membrane.
B) Contact between the hammer and the anvil.
C) Friction between the basilar and tectorial membranes.
D) Passage of the cochlear fluid through the oval window.