When Khrushchev demanded that US troops leave West Berlin, Kennedy responded by ○calling up additional troops. O building the Berlin Wall.
O withdrawing troops from the city.
○ launching the Bay of Pigs invasion.​

Explanation:

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Building the Berlin wall

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bilateral multipolar bipolar unilateral

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bipolar.  

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true false

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true.

explanation:

the answer is a, salt plain