The discovery _______ made by a team of international researchers _______ could revolutionize renewable energy.
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readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
, made by a team of international researchers,
B
made by a team of international researchers
C
—made by a team of international researchers,
D
—made by a team of international researchers—
Correct Answer: D
Choice D is the best answer. This question tests dash usage for emphatic parenthetical information.
- Context clues: The phrase adds emphasis about who made the discovery.
- Meaning: Dashes must be used in pairs for mid-sentence interruptions.
- Verify: "The discovery—made by a team of international researchers—could revolutionize..." correctly brackets.
💡 Strategy: Use matching dashes for emphatic parenthetical information.
Choice A is incorrect because commas work but provide less emphasis. Choice B is incorrect because punctuation is needed. Choice C is incorrect because dashes must be paired.