After World War II, the Soviet Union Gained Control of Poland

After World War II, the Soviet Union gained control of Poland by

A) sending in their air force.
B) sending in the Red Army to disrupt the lives of the Polish people and political maneuvering almost impossible.
C) intimidated the anticommunists there into accepting satellite status.
D) aligning with the resistance movements that had been involved in holding off the Nazis during World War II.
E) threatening to go to war with Poland if they didn't agree to accept occupation.