De-emphasis is the process which is crucially concerned to which of the following stated mechanisms ?

De-emphasis is the process which is crucially concerned to which of the following stated mechanisms ?
A. Boosting to higher frequency modulating signals.
B. Compensation to artificial boosting at receiver.
C. Compensation to artificial boosting in pre-emphasis at transmitter.
D. Boosting to lower frequency modulating signal.

a. Only C
b. Both B & C
c. Both A & C
d. Both A & B

Correct Answer : d. Both A & B

Explanation :

Boosting given to higher modulating frequencies at the stage of pre-emphasis is generally nullified at the receiver is known as de-emphasis. Therefore, both these conditions of artificial boosting & nullifying effect (compensation) are satisfied by option (d) while other options represent the controversial statements.