Answer:
C. Antihistamines
Explanation:
Antihistamines are commonly used to relieve symptoms of allergies, including congestion, sneezing, itching, and watery eyes. They work by blocking the action of histamine, a substance in the body that triggers allergic reactions. Examples of antihistamines include diphenhydramine (Benadryl), loratadine (Claritin), and cetirizine (Zyrtec).
