The correct answer is C) the United States achieved its goal of containing Communism within the Central American region.
The end result of the United States' decision to provide military aid to Central American countries in the 1980s was that the United States achieved its goal of containing Communism within the Central American region.
During the Cold War, tensions between the United States and the Soviet Union were the common denominator in the foreign affairs of these two countries. Russia wanted to spread Communism in many regions of the world. The Soviet Union already controlled or influenced Hungary, East Germany, Bulgaria, Romania, Poland, and Cuba. The United States policy always tried to stop Communism to spread in other countries. In the case of Central America, a region being so close to the U.S., it was of the utmost importance to stop Communism. So the end result of the United States' decision to provide military aid to Central American countries in the 1980s was that the United States achieved its goal of containing Communism within the Central American region.