What Would Occur If the Repressor of an Inducible Operon

Multiple Choice

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?

A) irreversible binding of the repressor to the promoter
B) reduced transcription of the operon's genes
C) buildup of a substrate for the pathway controlled by the operon
D) continuous transcription of the operon's genes
E) overproduction of catabolite activator protein (CAP)