What doctrine expanded maritime patrols to Central and South America?

The Roosevelt Corollary to the Monroe Doctrine is the correct answer because it specifically built upon the Monroe Doctrine's principles, which aimed to prevent European interference in the Americas. Announced by President Theodore Roosevelt in 1904, the Roosevelt Corollary asserted the right of the United States to intervene in Latin American countries to maintain stability and order. This was justified by the belief that the U.S. could act as a global police power in the region.

The Corollary expanded U.S. influence and reinforced the concept of using military force, if necessary, to prevent European nations from colonizing or interfering in Central and South America. It was a response to various crises in the region, exemplifying the United States' growing role in international affairs, particularly in the Western Hemisphere.

In contrast, the Monroe Doctrine itself was a policy from 1823 that opposed European colonialism in the Americas but did not advocate for direct intervention. The Truman Doctrine focused on containing communism after World War II, while the Carter Doctrine addressed U.S. interests in the Persian Gulf. Each of these has its context and specific focus, but only the Roosevelt Corollary directly pertained to expanding maritime patrols and intervention in Latin America.