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, the author hypothesized that smoking by itself can induce snoring.
Which one of the following, if true, casts the most doubt on the author’s hypothesis?
(A) Stress induces both snoring and smoking in certain individuals. - Correct. From the premise we know that "most" smokers/non-smokers don't snore. So among the remaining few people
...
Which one of the following, if true, casts the most doubt on the author’s hypothesis?
(A) Stress induces both snoring and smoking in certain individuals. - Correct. From the premise we know that "most" smokers/non-smokers don't snore. So among the remaining few people
...
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