Stimulus
A recent study found that snoring, though not common in either group, is more common among smokers than among nonsmokers. On the basis of this evidence, by itself can induce snoring.
What this question is testing
Your task
Find the choice that makes the argument's conclusion less likely to be true.
Common trap
Answers that look negative but attack a claim the argument never relied on.
Winning move
Find the assumption the argument depends on, then pick the choice that undermines it.
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