Question

In 1961, President Kennedy took action to prevent the Soviet Union from:

Answer 1

The answer is D. forcing West Berlin to become a part of East Germany. When the Russians built the Berlin Wall, people in the East were desperate to leave to leave and go to the West.  The West was also disappointed with Kennedy because the Wall was not only hard to cross but Communists now threatened them.  Kennedy reaffirmed his support by Sending Vice President Lyndon Johnson and U.S. troops to reaffirm his commitment to the West.

Answer 2

What president Kennedy did in 1961 was essentially that he took action in order to prevent the Soviet Union from forcing West Berlin to become a part of East Germany - D. 

He knew that the Soviet Union had appetites for increased control and rule over Berlin and Europe in general and he wanted to prevent that.