General Medicine General dfb6c882 After a radiograph revealed a sialolith (stone) in a patient's right submandibular duct, the surgeon exposed the duct an intraoral approach. In this approach, what tissues or structures must be cut through? A Mucous membrane only B Mucous membrane and genioglossus muscle C Mucous membrane and mylohyoid muscle D Mucous membrane and hyoglossus muscle