There Is a Mutation in the Lac Repressor That Results

There is a mutation in the lac repressor that results in a molecule known as a super-repressor because it represses the lac operon permanently.Which of these would characterize such a mutant?

A) It cannot bind to the operator.
B) It cannot make a functional repressor.
C) It cannot bind to the inducer.
D) It makes molecules that bind to one another.
E) It makes a repressor that binds CAP.