What Was True of Most South American Nations and All

What was true of most South American nations and all Central American nations in the 20th century?

A) They exported machinery, steel, and automobiles.
B) They boycotted the Organization of American States (OAS) .
C) They established the North American Free Trade Association. (NAFTA) .
D) They were subject to Marxist revolutions.
E) They remained largely agricultural societies.