During the Oropharyngeal Phase of Swallowing, Food Is Prevented from

During the oropharyngeal phase of swallowing, food is prevented from

A) reentering the mouth by elevation of the uvula, which lodges against the back of the throat.
B) entering the nasal passages by closure of the nasopharyngeal sphincter.
C) entering the trachea primarily by the epiglottis blocking the opening between the vocal cords.
D) more than one of these answers.
E) none of these answers.