Which One of the Following Statements About Mutations in the Lactose

Which one of the following statements about mutations in the lactose operon is NOT correct?

A) A lacI mutant would result in the loss of expression of repressor protein.
B) A lacI mutant would allow continuous or constitutive expression of both $\beta$ -galactosidase and lactose permease.
C) A mutation in the lacO sequence would allow continuous or constitutive expression of both $\beta$ -galactosidase and lactose permease.
D) In cells containing one mutant and one normal copy of lacI, the repressor is still expressed and lacZ and lacY will be expressed only in the presence of lactose.
E) In cells containing one mutant and one normal copy of lacO, lacZ and lacY are expressed only in the absence of lactose.