Why Was It Unlikely That the Soviet Union Was Going

Why was it unlikely that the Soviet Union was going to embark on a new military campaign in the years following World War II?

A) The communist nation had suffered more than 20 million casualties, along with immense devastation.
B) Stalin was eager to demonstrate to eastern Europeans the pacifist credentials of his communist regime.
C) The Soviet Union had made enormous territorial gains during the war and had every interest in securing them first.
D) Stalin was shocked and appalled by the American use of the nuclear bomb in Japan and vowed to his people never to sink to that level.