June 2018 LSAT Section 1 Question 27

The authors' primary purpose in the passage is to

on August 1, 2020

Why is A wrong?

It seemed to me that the author was discussing a topic that’s seemed to confuse the scientific community because of evolutionary data and the timeline in question. I understand that there is hypothesis in this but I don’t see how the author is truly proposing it at the whole time the author seemed to be discussing the hypothesis in question?

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on August 5, 2020

Please Help

on August 9, 2020

^^^^^^^^^^^^

on August 22, 2020

I would also like an answer.

on December 24, 2020

Can someone answer this??? Shouldnt take several students to ask!