Which sentence correctly uses a coordinating clause Please help this is due in an hour and I'm stuck

B. Meg had to pay a fine; she ran a red light.

Explanation:  These are two independent clauses (necessary to be coordinating) joined by a semicolon. It would be possible to use a comma + and in place of the semicolon and still have coordinating clauses.

Examples A and D have subordinate clauses and a main clause. C has an introductory adverb phrase.