In Order to Find Your Optimum Vocal Pitch, Sing Up

Multiple Choice

In order to find your optimum vocal pitch, sing up the musical scale from the lowest note you can sing. Then,

A) sing the highest note you can and find the pitch between your low and high pitch limits.
B) sing up one octave to reach your optimum pitch.
C) sing up to the 20th or 21st note to reach your optimum pitch.
D) sing up to the eighth or ninth note to reach your optimum pitch.
E) sing up to the fifth or sixth note to reach your optimum pitch.