Question ID:PT72 S2 Q18 Passage:Journalist: Scientists took blood samples from two large, diverse groups of volunteers. All the volunteers in one group reported that they enjoyed eating vegetables, whereas all those in the other group disliked vegetables. When the blood samples from the group that disliked vegetables were analyzed, it was discovered that all the volunteers in that group had a gene in common, the XRV2G gene. This strongly suggests that a dislike of vegetables is, at least in some cases, genetically determined. Stem:The journalist's argument is most vulnerable to criticism on which one of the following grounds? Correct Answer Choice:EChoice A:It presumes that all human traits are genetically determined. Choice B:It overlooks the possibility that the volunteers in one or both of the two groups may not have been representative of the human population as a whole in one or more respects. Choice C:It overlooks the possibility that even when one phenomenon always produces another phenomenon, the latter phenomenon may often be present when the former is absent. Choice D:It overlooks the possibility that even if a dislike of vegetables is genetically determined, it may be strongly influenced by genes other than the XRV2G gene. Choice E:It takes for granted that the volunteers in the group that enjoyed eating vegetables did not also all have the XRV2G gene in common.