What was one way that America responded to the fear of nuclear attack in the postwar years? O The United States decided to stop supporting West Berlin to prevent conflicts with the Soviets.
o Congress began investigating people suspected of being communists or communist sympathizers.
O The U. S. military built nuclear missile facilities in Cuba to deter future attacks from Soviet warships.
o Congress passed immigration laws to prohibit Eastern Europeans from moving to the United States.

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Explanation:

Atomic fears and the arms race artical that khan academy has might give clues for the answer.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

the church governed the society after the empire fell.   constantine took charge of rome and ended the confusion which had over religion and made christianity as the only religion and that started ruling the roman empire. he also divided the empire into two and fortified the eastern part.   he ruled the eastern part.