Which events occurred in 1943 and helped to make the Allied victory possible?

A.
Hitler violates the Nazi-Soviet Pact by invading the Soviet Union.

B.
The Allies crack the German naval code.

C.
Japanese and Americans of Japanese ancestry are forced to relocate to internment camps.

D.
A German army division surrenders at Stalingrad.

I know its D but it says more than one answer.