A partial diploid containing a wild type allele for lacI and a lacI mutant that was unable to bind the inducer would:

A) always show low levels of β-galactosidase gene expression.
B) show normal induction in the presence of an inducer.
C) express β-galactosidase at all times.
D) only show normal induction in the presence of an inducer in the absence of glucose.
E) show induction in the presence of an inducer in the presence of glucose.