An Arg^- Strain of E

An arg^- strain of E.coli is transformed with a plasmid carrying the wild-type (arg⁺) gene.The transformed cells are replica-plated to two minimal medium plates: one supplemented with arginine and one lacking arginine.The transformed cells would grow on

A) only the plate supplemented with arginine.
B) only the plate lacking arginine.
C) both plates.
D) neither plate.
E) the plate supplemented with arginine,but only if a mutation occurred.