(A) Yalta Conference
(B) Neutrality Acts.
(C) ** Nazi-Soviet Pact
(D) Lend-Lease Act.
EXPLANATIONS BELOW
Concept note-1: -The Molotov-Ribbentrop Pact was a non-aggression pact signed in 1939 by Nazi Germany and the Soviet Union shortly before World War II. In the pact, the two former enemies agreed to take no military action against each other for the next 10 years.