The discovery challenged everything scientists believed about the origins of the universe _______ it rewrote the textbooks overnight.
1
readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
universe, it
B
universe; it
C
universe: it
D
universe—it
Correct Answer: D
Choice D is the best answer. This question tests dash usage for dramatic emphasis.
- Context clues: The second clause provides dramatic emphasis on the discovery's impact.
- Meaning: A dash can emphasize a dramatic or surprising result.
- Verify: "...challenged everything scientists believed about the origins of the universe—it rewrote the textbooks overnight" creates dramatic effect.
💡 Strategy: Use a dash for dramatic emphasis or to signal an unexpected consequence.
Choice A is incorrect because a comma creates a comma splice. Choice B is incorrect because while grammatically correct, it doesn't capture the dramatic emphasis. Choice C is incorrect because a colon typically introduces explanation, not dramatic result.