Answer:
The right answer is B.
Step-by-step explanation:
The Soviet Army had expelled the German Army from the territories of several Eastern European countries (Poland, Czechoslovakia, Yugoslavia, for example) in 1944-1945, an act called their "liberation.". However, Soviet troops remained there for security reasons. The Soviet Union also supported local Communist parties or movements and propelled their candidates. Besides, there was the Yalta agreement among the top Allied leaders, including the US, which gave influence to victorious powers over the countries they occupied.