Which of the following best describes the Valsalva maneuver?
A) It prevents food and drink from entering the nasal cavity.
B) It is used to dislodge foreign matter from the airway.
C) It increases pressure in the abdominal cavity and helps to expel abdominal contents.
D) It protects the lungs from overinflation.
E) It prevents food and drink from entering the trachea.
