Final answer:
Cromolyn sodium stabilizes epithelial mast cells, reducing the release of histamine.
Step-by-step explanation:
C. Cromolyn sodium stabilizes epithelial mast cells, thereby reducing the release of histamine. It is an antiallergy medication used to treat asthma, allergies, and other respiratory conditions. By stabilizing the mast cells, cromolyn sodium prevents the release of histamine, which is responsible for allergic symptoms such as itching, sneezing, and nasal congestion.