Which group is recognized for performing Latin American songs?

The correct choice is the group recognized for performing Latin American songs, which aligns with the designation of "Cojuntos." This term specifically refers to musical groups that traditionally perform Latin music styles, particularly in the context of various Latin American folk, popular, and traditional music genres. These groups often incorporate traditional instruments and rhythms unique to the regions they represent, allowing them to capture the essence of Latin American culture through their performances.

In contrast, jazz ensembles primarily focus on improvisational music rooted in jazz traditions and do not specialize in Latin American genres. Choral groups might perform a wide array of music but typically are not limited to Latin American songs; they generally focus on harmonized vocal arrangements across different styles and periods. String quartets concentrate on classical or instrumental compositions for string instruments and do not engage with the specific cultural context of Latin American music. Thus, "Cojuntos" is the group type most directly associated with the performance of Latin American songs, making it the most suitable answer.