9-6A3 B
 How is pre-emphasis used in an FM transceiver? 
A. The lower modulation frequencies are boosted before transmitting by 3 db per octave and reduced by the same amount at the receiver.
B. The higher modulation frequencies are boosted before transmitting by 6 db per octave and reduced by the same amount at the receiver.
C. The lower modulation frequencies are boosted before transmitting by 6 db per octave and reduced by the same amount at the receiver.
D. The higher modulation frequencies are boosted before transmitting by 3 db per octave and reduced by the same amount at the receiver. 
