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?
Answer
A
a device that causes congestion
B
a resource that defines congestion
C
a way to measure congestion
D
a substance that reduces congestion
Explanation
The prefix de- can mean “remove” or “reduce.” A decongestant is a substance that reduces congestion, so choice D is correct.
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