In the 1950s, the united states became especially concerned about latin american countries because they were threatening to attack the united states. they no longer wanted to trade with the united states. they had come under the threat of communism. they were becoming more powerful than the united states.

they had come under the threat of communism.

Explanation:

The commitment of the Truman administration to “contain” communism was focused on the Soviet threat to western Europe. During the 1950s, the Eisenhower administration expanded America’s objective from protecting a divided Europe to combating Communist tyranny around the globe. To the Eisenhower administration, merely “containing” communism was no longer enough: the explicit objective became a “policy of boldness” designed to “roll back” communism around the world.

your answer would be (b)

its c not d   tell me if that´s correct