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When working with additional information in a sentence, when should dashes be used instead of commas or parentheses?

AA dash is always used when renaming a noun.
BA dash is used to continue the flow of a complex sentence.
CA dash is used to set off a relatively important aside in a way that grabs the reader's attention.
DA dash is used in formal writing to set off less important background information.

Verified Answer :

Dashes should be used instead of commas or parentheses when working with additional information in a sentence in which:

C. A dash is used to set off a relatively important aside in a way that grabs the reader's attention. 

Instead of using parentheses to emphasize a particular point that aids the sentence clarity in meaning, the most efficient punctuation to use is a dash.