[A] : Hair cells on the basiiar membrane are responsible for hearing.
[R]: Pressure waves which begin at the oval window, cause the basilar membrane to vi- brate so that the ciliaxof the hair celis touch the tectorial membrane. This causes hair cells to initiate nerve impulses
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false