Question

read the sentence. when i told the doctor of my sinus pain and nasal pressure, she offered me a decongestant. based on the prefix, de-, what does the word “decongestant” mean? a device that causes congestion a resource that defines congestion a way to measure congestion a substance that reduces congestion

Explanation:

The prefix "de -" often means "remove" or "reduce". In the context of the sentence, the person has sinus pain and nasal pressure (which are related to congestion). A decongestant would logically be something that acts against congestion. So, it should be a substance that reduces congestion.

Answer:

a substance that reduces congestion