When Using LacZ as a Reporter Gene, Researchers Add X-Gal

Multiple Choice

When using lacZ as a reporter gene, researchers add X-Gal to the substrate.What would happen if they didn't?

A) The transformed cells would die.
B) Untransformed cells would survive.
C) -galactosidase would not be produced.
D) -galactosidase would be inactivated.
E) One could not easily see which cells had -galactosidase.