E4E09 - Amateur Extra Class

E4E09 : What undesirable effect can occur when using a noise blanker?
A Received audio in the speech range might have an echo effect
B The audio frequency bandwidth of the received signal might be compressed
C Strong signals may be distorted and appear to cause spurious emissions
D FM signals can no longer be demodulated
Correct Answer: Strong signals may be distorted and appear to cause spurious emissions