The discovery was groundbreaking _______ the first of its kind in modern science.

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Which choice completes the text so that it conforms to the conventions of Standard English?

A

groundbreaking,

B

groundbreaking;

C

groundbreaking—

D

groundbreaking:

Correct Answer: C

Choice C is the best answer. This question tests dash usage for emphatic elaboration.

  1. Context clues: What follows emphasizes just how groundbreaking the discovery was.
  2. Meaning: A dash can introduce emphatic elaboration.
  3. Verify: "The discovery was groundbreaking—the first of its kind in modern science" adds emphasis effectively.

đź’ˇ Strategy: Use a dash to introduce emphatic or dramatic elaboration.

Choice A is incorrect because a comma doesn't provide sufficient emphasis. Choice B is incorrect because a semicolon requires two independent clauses. Choice D is incorrect because while a colon works, a dash provides more emphasis here.