The right answer here would be A - the phrase 'modulate your voice'
refers to a need to vary your voice's properties. Modulating means
changing the pitch or tone, and can be used referring to one's voice, or
to an instrument. You can modulate both up or down, and this usually
involves changing the key signature in which you are playing or singing.
I don’t understand what is ur question
I have never in my entire life heard this ? is this a new term or something people just make up anything now n days !
what web do i find this novel from?