Explanation
Correct answer: B.
Choice B is the best answer because it presents a detail that, if true, would most effectively illustrate the underlined claim that as nueva canción spread beyond Chile, the breadth of musical traditions incorporated into its foundation also expanded. The text explains that the movement was initially founded on traditional Chilean folk forms compiled by Parra, so if many nueva canción songs demonstrate the stylistic influence of corrido—a Mexican narrative song genre—that would show that a musical tradition originating outside Chile became part of the movement’s foundation, directly illustrating the text’s claim about how the breadth of nueva canción expanded.
Why the other choices are wrong
Choice A
Choice A is incorrect because the finding addresses lyrical content—political commentary on issues stemming from European colonization—rather than musical traditions. Even if nueva canción songs across different countries share political themes, that doesn’t indicate that new musical forms or styles were incorporated into the movement’s foundation. Thematic content is distinct from the musical traditions that songs draw on stylistically.
Choice C
Choice C is incorrect because the quena is described as a “traditional flute used across Andean countries, including Chile,” meaning it’s part of the Chilean folk tradition that underpinned nueva canción at its origin. Use of the quena therefore wouldn’t illustrate the incorporation of musical traditions beyond those that founded the early movement in Chile.
Choice D
Choice D is incorrect because the finding establishes only that artists in additional Latin American countries produced nueva canción songs, not that those artists incorporated musical traditions from their own countries into the movement. Artists in other countries could still have been drawing on the same Chilean folk forms that originally founded the movement, so geographic spread alone doesn’t illustrate an expansion of musical traditions.