Answer:
Japanese Americans on the West Coast were sent to internment camps without ever being accused of a crime.
Answer is D. It has been used as a source of political power for years.
The correct answer is: cold weather.
It would not be benefiting from Polish aid, as Poland was also in conflict with Soviet Union.
The major factor that helped the Soviets was the cold weather: the Nazis were not prepared for it as well as the Soviets were and additionally attacking is harder in cold weather than defense (the Russians were defending themselves and the Germans were attacking).
C is the answer to the question