Which best describes the main purpose of the Monroe Doctrine? A) It established the border between the U.S. and Canada after the war of 1812. B) It served as a warning to European nations to not try and re-colonize Latin America because the U.S. would intervene. C) It stated that the U.S. would not support the revolution efforts of Latin American countries against Spain or Great Britain. D) It stated that the U.S. had a right to seize Florida from Spain because of the Native American attacks along the Florida/Georgia border.