Which of the following most logically completes the argument?
The claim that Homo habilis, Homo rudolfensis and Homo erectus, three classifications of hominids extant about 2 million years ago, might represent a single species, is considered tentative, since it is based on a single analysis in the journal Science of a single fossil specimen known as "skull 5." One evolutionary biologist reports several of his colleagues are writing concurring articles. Nonetheless even if that prediction proves correct, these new articles will lend no support to the claim that the three species are in fact one,