Question ID:PT63 S1 Q19 Passage:Anthropologist: It was formerly believed that prehistoric Homo sapiens ancestors of contemporary humans interbred with Neanderthals, but DNA testing of a Neanderthal's remains indicates that this is not the case. The DNA of contemporary humans is significantly different from that of the Neanderthal. Stem:Which one of the following is an assumption required by the anthropologist's argument? Correct Answer Choice:CChoice A:At least some Neanderthals lived at the same time and in the same places as prehistoric Homo sapiens ancestors of contemporary humans. Choice B:DNA testing of remains is significantly less reliable than DNA testing of samples from living species. Choice C:The DNA of prehistoric Homo sapiens ancestors of contemporary humans was not significantly more similar to that of Neanderthals than is the DNA of contemporary humans. Choice D:Neanderthals and prehistoric Homo sapiens ancestors of contemporary humans were completely isolated from each other geographically. Choice E:Any similarity in the DNA of two species must be the result of interbreeding.