📝 ACT Exam Prep

Which sentence uses commas correctly with a nonrestrictive clause?

A My sister who lives in Boston is visiting.

B My sister, who lives in Boston, is visiting.

C My sister who lives in Boston, is visiting.

D My sister, who lives in Boston is visiting.

✓ Correct Answer: Option B

Nonrestrictive clauses (additional, non-essential info) are set off by commas on both sides.

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