Answer: B.to prevent the spread of communism
Explanation:
Reagan’s foremost international concern was in Central America, where he detected the most serious Communist threat. The tiny nation of El Salvador caught up since 1980 in a brutal struggle between Communist-supported revolutionaries and right-wing militants, received U.S. economic and military assistance. Critics argued that U.S. involvement guaranteed that the radical forces would gain public assistance by capitalizing on “anti-Yankee” sentiment. Supporters countered that allowing a Communist victory in El Salvador would lead all of Central America to enter the Communist camp (a new “domino” theory). By 1984, however, the U.S.-backed government of President José Napoleón Duarte had brought a modicum of stability to El Salvador.