Read the sentence and determine which revision, if any, is necessary."Valentina’s mother an art history professor often gives lectures at the local museum.”

“An art history professor” renames and adds information about Valentina’s mother, so it is a nonessential appositive. Set it off with commas: “Valentina’s mother, an art history professor, often gives lectures at the local museum.”

AI-written and checked against the verified answer.