_______ the research team presented their findings to the scientific community.
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readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
After completing a decade of rigorous study,
B
After completing a decade of rigorous study
C
After completing, a decade of rigorous study,
D
After, completing a decade of rigorous study
Correct Answer: A
Choice A is the best answer. This question tests comma usage after introductory phrases.
- Context clues: A participial phrase introduces the main clause.
- Meaning: Use a comma after an introductory phrase before the main clause.
- Verify: "After completing a decade of rigorous study, the research team presented..." correctly separates.
💡 Strategy: Always use a comma after an introductory participial or prepositional phrase.
Choice B is incorrect because it lacks the required comma. Choice C is incorrect because the comma after "completing" splits the phrase incorrectly. Choice D is incorrect because the comma after "After" is incorrect.