D. Imperialism
Is the correct answer
The Soviet Union - they were the cause and driving force behind Communism in Eastern Europe from the 1920/30s into the 80s. Without their military power and influence, communism in Eastern Europe fell away.
It was said that Dwight Eisenhower's presidency signal was a more conservative direction for the government because Eisenhower prioritises the use of military forces in the USA or internationally, which could be a result of the president's illustrious military background.
The impact was that they were trying to steal the other person's land
