What Is the Most Expected Effect of a Deletion Mutation

What is the most expected effect of a deletion mutation covering the promoter sequence of the lactose operon?

A) Loss of catabolite repression of beta-galactosidase.
B) Loss of transcription of the beta-galactosidase gene in the presence of lactose.
C) Transcription of the beta-galactosidase gene in the absence of lactose.
D) Transcription of the beta-galactosidase gene only in the presence of high levels of lactose.
E) Constitutive synthesis of beta-galactosidase in an F' merodiploid.