What Effect Did the U

What effect did the U.S.contribution to the war effort during World War II have on GNP?

A) It boosted GNP dramatically.
B) It boosted GNP slightly.
C) GNP fell to its lowest level in years as resources were depleted.
D) Since resources were only transferred from one kind of production to another, there was virtually no effect.
E) It made GNP difficult to estimate accurately, since output was being diverted to the government.