All of the Following Statements About the Mixed Function Oxidase

All of the following statements about the mixed function oxidase systems are correct EXCEPT which one?

A) Many times a hydroxylation reaction is involved.
B) It is often considered a detoxification reaction in the liver.
C) It can involve an O-dealkylation of N-dealkylation of substrate.
D) It may result either in inactivation of drugs or formation of a more active compound.
E) Its activity does not vary upon administration of a variety of drugs or other foreign compounds.