Some Active Drugs Are Known to Be Enzymatically Metabolized Active

Some active drugs are known to be enzymatically metabolized active metabolites but are not considered prodrugs.Which of the following explains the difference between these drugs and prodrugs?

A) Prodrugs are metabolized into extremely concentrated drugs that reach their steady state in a shorter period of time.
B) Prodrugs do not require enzymatic metabolism to be converted to active metabolites.
C) Prodrugs are not eliminated until they are converted to active metabolites.
D) The active form of a prodrug is either unstable, not readily soluble, or poorly absorbed.