When are commas normally used? Choose three correct answers.

Use a comma before a conjunction such as “and” or “but” when it joins two independent clauses. Commas also set off nonrestrictive phrases and clauses, which add extra information, and usually follow introductory phrases or clauses. A dependent clause introduced later in a sentence does not normally need a comma before its conjunction, and restrictive information is not set off with commas.

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