Question

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.

Answer 1

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. 

I hope this helps!

Answer 2

The answer is A - Dad thought we should have hamburgers for the cookout; but Mom wanted chicken. I hope this helped you!