How did the Cold War between the United States and the Soviet Union grow out of World War II?

ASoviet and U.S. leaders disagreed strongly about the way nuclear weapons were used during the war.
BDuring the war, the Soviet Union had broken promises to its allies, leading to resentment and mistrust.
CThe war established the two nations as the world's superpowers, but their politics were in direct conflict.
DThe Soviet Union felt betrayed by its U.S. allies, who did not offer monetary support for rebuilding after the war.

After the end of World War II, two different blocs were created. One was the Western front, with the USA and its European allies as the main representatives (and the Western part of Germany and its capital), and the other was the Eastern Bloc, with the USSR and its satellite states as the main representatives (and the Eastern part of Germany and its capital). These two sides strongly disagreed with each other´s politics and economic practices; on the Western side, democracy and capitalism was advanced, principally by the USA, while on the Eastern bloc, socialism and a strong authoritarian state was the main objective to protect. These factors caused strong frictions between the USSR and the USA, which resulted in an escalating arms race that many times threatened to result in a full blown nuclear warfare.