When You Hear a 4000 Hz Tone,hair Cells at One

Multiple Choice

When you hear a 4000 Hz tone,hair cells at one point on the basilar membrane become active.What happens when they double their rate of activity?​

A) The pitch is the same, but it is louder.
B) ​The pitch is the same, but it is softer.
C) ​The pitch is one octave higher.
D) ​The pitch is half an octave higher.