In each set below, choose the sentence that uses the correct coordinating or subordinating conjunction and correct punctuation. Then choose the letter that indicates your choice.

A.
June’s grandparents retired in Colorado but, her parents preferred to retire in California.

B.
June’s grandparents retired in Colorado, but her parents preferred to retire in California.

C.
June’s grandparents retired in Colorado; but, her parents preferred to retire in California.

D.
June’s grandparents retired in Colorado but her parents preferred to retire in California.