Answer:
communist expansion in Europe should be contained
Explanation:
Containment was a foreign policy of the united states of America. It was introduced when the cold war was about to start so that the spread of communism could be stopped entirely or kept contained.
Harry S. Truman, the 33rd president of the United States, adopted this policy, and it was put in place in such a way that the united states would not make moves to get back territories that have already falling into communism.