Some Lac Operon Mutations Allow for Beta Galactosidase to Be

Multiple Choice

Some lac operon mutations allow for beta galactosidase to be expressed constitutively even in the absence of lactose.Which of the following lac genotypes would allow for this constitutive expression?

A) I⁺ P⁺ O⁺ Z^- Y⁺ A⁺
B) I^s P⁺ O⁺ Z⁺ Y⁺ A⁺
C) I⁺ P^- O⁺ Z⁺ Y⁺ A⁺
D) I⁺ P⁺ O^c Z⁺ Y⁺ A⁺
E) I⁺ P⁺ O⁺ Z⁺ Y⁺ A⁺