The Sensation of Loudness or the Volume of a Sound

The sensation of loudness or the volume of a sound is detected by ________.

A) high volume sounds can travel all the way the apex of the scala vestibule with enough energy remaining to deflect hair cells
B) vibration along a greater length of the basilar membrane, stimulating a greater number of hair cells
C) faster vibration of the basilar membrane resulting in a higher frequency of hair cell stimulation
D) greater movement of the basilar membrane resulting in greater deflection of the hair cells