Which sentence correctly uses commas to offset a phrase in the sentence?

The phrase “if not years” adds extra information and is correctly set off by commas on both sides. In B, the commas incorrectly separate “who lives in another state” from the noun it identifies and separate the subject from the verb. C breaks up the phrase “went to a late-night rock concert,” and D places a comma inside the name phrase instead of around the extra description “a poodle named Toby.”

AI-written and checked against the verified answer.