Many people, when they have a sinus headache, often use decongestant nasal sprays. Why are such sprays useful?

A) They have a pain-blocking effect in the brain.
B) They dry out the breathing passageways in the pharynx, making it easier to breathe.
C) They reduce swelling, allowing the sinuses to drain.
D) They reduce the symptoms of sore throat inflammation, which exacerbates the pain.


Answer: C

Biology & Microbiology

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