Which sentence uses correct punctuation? A. Dad thought we should have hamburgers for the cookout; but Mom wanted chicken. B. Dad thought we should have hamburgers for the cookout; Mom wanted chicken. C. Dad thought we should have hamburgers for the cookout, Mom wanted chicken.
I would say B. Since both are independent clauses and there's no and between them then you would need a semicolon. The other sentences punctuation are wrong.
