In many bilingual communities of Puerto Rican Americans living in the mainland United States, people use both English and Spanish in a single conversation, alternating between them smoothly and frequently even within the same sentence. ████ █████████████████ ███████████████████ ██████ ██ █████████ ████████████ ███
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In
report evidence supporting ███ ██████████ ████ ███ ████████ ██████████████ ███ █ ██████████ █████
This best captures the purpose as explained below the question stem.
show that reasons ███ ██████████████ ██████ ████ ███ █████████ ██ ███████
The last paragraph doesn’t involve different communities and different reasons for code-switching in these different communities. Since (B) doesn’t happen in the last paragraph, it’s not the purpose of the last sentence.
supply evidence that █████ ██ ████████ ████ ███ ████████████ ███████████ █████ ███ ███ ██████ ███████ ██ ██████████████
The last sentence doesn’t present evidence that conflicts with researchers’ conclusion about why the family code-switched. It supports the conclusion that the family code-switched for rhetorical effect.
refute the argument ████ ███████████ ███████ ███████ ████ ██████████████
The author never suggests that it’s incorrect to believe most code-switching is explained by situational factors. So (D) can’t be the purpose of the last sentence.
explain how it █████ ██ ████ ███ ██████ ███████ ██████ ██ ██████ █████ ███ ██ ███████
The last sentence involves the family members’ explanation for why they code-switched. This doesn’t help explain why the family members didn’t realize that they code-switched until it was pointed out to them.