6. What was one result of Hitler's invasion of the Soviet Union?
a. Germany gained access to Soviet factories and farms.
b. Stalin fled the Soviet Union.
C. Germany was able to take control of Leningrad.
d. Churchill and Stalin became allies.

d. Churchill and Stalin became allies.

Explanation:

4/23/1941 Prime Minister of the United Kingdom of Great Britain Winston Churchill sends a letter to the Prime Minister of the USSR, Joseph Stalin, informing him that the German Government is preparing an attack on the USSR. July 18, 1941 USSR Prime Minister Joseph Stalin sent a letter to the Prime Minister of the United Kingdom, Winston Churchill: demanded that the United Kingdom open a second front in the west (in northern France) and in northern Europe (in the Arctic). 7/20/1941 Prime Minister of the United Kingdom of Great Britain Winston Churchill replies to the Prime Minister of the USSR, Joseph Stalin, that the Germans have 40 divisions in France and that the British have no opportunity to open another front in either France or the Arctic. September 15, 1941 USSR Prime Minister Joseph Stalin sent a letter to the Prime Minister of the United Kingdom of Great Britain, Winston Churchill, requesting that the United Kingdom open a second front in the West or send twenty-five to thirty divisions via the Archangel or Iran . October 25, 1941 US Prime Minister Winston Churchill, through the British Ambassador to Moscow, informs USSR Prime Minister Joseph Stalin that the UK has no possibility of sending 25-30 Divisions through the USSR Archangel or Iran. August 12, 1942 Multi-day talks (Moscow Conference) begin between the Prime Minister of the USSR, Joseph Stalin, Prime Minister Winston Churchill, and Averell Harriman, US Presidential Envoy discussing general plans for future federal operations.