A popular sports drink company sampled 20 people who drink its product regularly and found that they performed better during a physical test than did those who do not drink the product regularly.What might be a possible confound in the study?
A) The sample size is small.
B) It rained on the day of the physical test.
C) Regular drinkers of sports drinks may be more athletic than those who are not.
D) The company funding the test was biased since it sells sports drinks.
Correct Answer:
Verified
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