Refer to the Figure

Refer to the figure.
This figure demonstrates that when only three harmonics of the same fundamental frequency are presented (B-D) , listeners still hear the pitch of the fundamental frequency because the harmonics all

A) share a common energy fluctuation of 250 Hz.
B) have the same intensity.
C) occur at the same time.
D) peak at the same amplitude which changes the frequency into a 250-Hz signal.
E) share the same pitch.