Latin America refers to countries in the Western Hemisphere (Americas) south of the United States where Romance languages (Spanish, Portuguese, French) are spoken. Option A is correct - it includes Mexico, Central America, South America, and Caribbean islands. Option B is incorrect - not all OAS members are in Latin America (Canada, USA are members). Option C is incorrect - economic ties don't define the region. Option D is incorrect - it's not the entire continents, just specific countries/regions.