According to Strunk, what is the correct way to punctuate this compound sentence?

Each part—“Tony cooked dinner,” “I made the salad,” and “Mike just ate”—is an independent clause. Strunk’s rule calls for a comma before a coordinating conjunction that joins independent clauses, so commas belong before both “and” and “but.” Choice B punctuates both joins correctly.

AI-written and checked against the verified answer.