Which sentence correctly uses a semicolon? A. During the summer break, Anna had worked laboriously to complete her projects and assignments, and therefore; she was sure she would get excellent grades. B. Keith was bold and courageous; however, he screamed when he heard the window panes rattling as a result of strong winds. C. Elcina was eager to join banjo classes and to learn ballet dance; but could not do so because of the day and the timing were the same for both. D. Mary wants to become a pilot; but her parents, who themselves were doctors, wanted her to choose the medical profession.