Which one of the following statements is correct?

A. AGC in radio receivers will keep the total signal output fairly constant but the noise component will be reduced; with the result the S/N ratio will improve

B. AGC in radio receivers is a linear operation w.r.t. both signals and noise

C. Sudden changes in the output while tuning, which may cause damage to the components, is an unavoidable feature of AGC

D. AGC operation is independent of the filter components used in AGC circuit

Answer: Option C