Answer:
The Cold War between the U.S. and Soviet Union originated from postwar disagreements, conflicting ideologies, and fears of expansionism. At both the Yalta Conference and Potsdam Conference, U.S. and Soviet leaders sharply disagreed over the future of the post-war world.

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The Cold War | Boundless US History
got it from ^
The answer is A. a change to the constitution.
Hope i helped ^_^
Because that’s what choose what the believed and how they lived there life’s from day to day
Answer: One word=Power
Explanation:
The Soviet Union wanted power plus they were a communist country so they wanted to spread communism and at that time Americans were scared of Communism
