GMAT Club Tests | V11-11

I think this is apoor-quality question and I don't agree with the explanation. It would be great if you would specify where, in the argument, has the position of argument been mentioned. As I see it, A Proposal of Researchers is followed by results of 3 Different Studies. There is not even a single word talking about the Tone of Argument. Let alone a statement or something to denote the position that argument supports.

Moreover, OE assumes that IQ level cannot be higher than 145. This may be
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