Multiple Choice
Approximately 1000 college students were asked to keep a record of what supplemental vitamins they took and how many colds they had over the course of a year.The amount of vitamin C consumed was compared with the students' incidences of colds.This is an example of a(an) :
A) clinical trial.
B) epidemiological study.
C) intervention study.
D) laboratory study.
Correct Answer:
Verified
Correct Answer:
Verified
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