Question

The allied decisions that delayed an invasion of france select one:

Answer 1

The answer should be; A. left the Soviet Union deeply embittered,B. put the Soviet Union in a better position to control eastern Europe, and
C. occurred after the Soviet Union had won a significant victory in Stalingrad. 
All of these events delayed the invasion of France.
Hope this helps!:)

Answer 2

I would say C after the Russians won the battle of Stalingrad they led a counter offensive, the Germans also took huge casualties and had to retreat, the Allies picked to invade shorty after because Russia could now hold the front.