Which statement best summarizes how US national security policy has changed in Latin American countries such as El Salvador, Chile, and Nicaragua? These countries have transitioned to military rule, and the United States has increased aid to them. These countries have experienced recent communist revolutions, and the United States has cut off aid to them. These countries have transitioned to democracy, and the United States has increased aid to them. These countries have transitioned to democracy, and the United States has decreased aid to them.