The correct sentence is Carol was the last person out of the house, wasn't she?
Why is a comma important?
Commas help your reader figure out which words go together in a sentence and which parts of your sentences are most important. Using commas incorrectly may confuse the reader, signal ignorance of writing rules, or indicate carelessness.
What are the Rules of commas?
Comma Rules
- Use a comma after an introductory phrase or clause.
- Use commas before and after a parenthetical phrase or clause.
- Use a comma to separate two independent clauses linked by a coordinating conjunction (and, but, for, nor or, so, yet)
- Use a comma to separate items in a series.
Learn more about the use of commas here https://brainly.com/question/2251561
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