Question ID:PT74 S1 Q18 Passage:Medical researcher: A survey of more than 1 million adults found that there was a greater frequency of illness among people who regularly slept at least 8 hours a night than among people who slept significantly less. This shows that mild sleep deprivation is not unhealthy and, in fact, probably bolsters the body's defenses against illness. Stem:The reasoning in the medical researcher's argument is most vulnerable to criticism on the grounds that the argument Correct Answer Choice:AChoice A:fails to address the possibility that an observed correlation between two phenomena is due to another factor that causally contributes to both phenomena Choice B:fails to consider that even if a given factor causally contributes to the occurrence of a given phenomenon, it may not be the only factor affecting the occurrence of that phenomenon Choice C:concludes, from the claim that a certain phenomenon occurs and the claim that a certain condition is sufficient for that phenomenon to occur, that the condition also exists Choice D:takes for granted that there will be an observable correlation between two phenomena if either of those phenomena causally contributes to the other Choice E:fails to consider that even if a specific negative consequence is not associated with a given phenomenon, that phenomenon may have other negative consequences