What Are the Differences Between Conductive Deafness and Sensorineural Deafness

What are the differences between conductive deafness and sensorineural deafness?

A) No differences exist;they are two names for the same pathologic condition.
B) Acoustic trauma,ototoxic drugs,or disease cause conduction deafness;excessive wax in the outer ear or otitis media cause sensorineural deafness.
C) Conduction deafness involves the outer or middle ear;sensorineural deafness involves the receptor cells and/or cochlear nerve.
D) Conduction deafness involves the cochlear nerve;sensorineural deafness involves the outer or middle ear.