Answer: the open yet restricted rivalry that developed after World War II between the United States and the Soviet Union and their respective allies
During World War II, the United States and the Soviet Union fought together as allies against the Axis powers. However, the relationship between the two nations was a tense one. Americans had long been wary of Soviet communism and concerned about Russian leader Joseph Stalin’s tyrannical rule of his own country. For their part, the Soviets resented the Americans’ decades-long refusal to treat the USSR as a legitimate part of the international community as well as their delayed entry into World War II, which resulted in the deaths of tens of millions of Russians. After the war ended, these grievances ripened into an overwhelming sense of mutual distrust and enmity.
Explanation:
Because the east had been better fortified, that is where the capitol was, and it was more densely populated. The west was not only younger, but it was also in the way and at constant war with the Arabs.
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B is the best answer to my knowledge