The scientist's research, which is focused on the impact of climate change on coral reefs, ______ a variety of complex factors.
","stem_html":"Which choice completes the text so that it conforms to the conventions of Standard English?
","rationale_html":"The correct answer is "involves." The sentence requires a finite verb to modify the noun phrase "the scientist’s research." The participle "involving" would be incorrect because it's a nonfinite verb. The past participle "involved" would be incorrect because it suggests the action has already been completed. "To involve" would be incorrect because it's a nonfinite to-infinitive. Of these choices, only the present tense verb "involves" makes sense in the context.
","correct_answer":["A"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"involves
","ord":0},{"label":"B","content_html":"involving
","ord":1},{"label":"C","content_html":"involved
","ord":2},{"label":"D","content_html":"to involve
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