A Lac Operon of Genotype LacI⁺ LacP⁺ LacO⁺ LacZ⁺ lacY^- $\beta$

A lac operon of genotype lacI⁺ lacP⁺ lacO⁺ lacZ⁺ lacY^- will produce $\beta$ -galactosidase but not permease when:

A) lactose is present.
B) lactose is absent.
C) in the presence or absence of lactose.
D) glucose is present.
E) glucose and lactose are both present.