The sentence that uses hyphens correctly is When taking United States history, most of my peers enjoyed studying the Swinging Sixties, but I preferred the period pre–Civil War.
This refers to the punctuation that is used to indicate a pause, or join a compound word in a sentence,
Hence, we can see that The sentence that uses hyphens correctly is When taking United States history, most of my peers enjoyed studying the Swinging Sixties, but I preferred the period pre–Civil War.
This is because the hyphen is correctly used in option D.
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