GRE Reading Comprehension: PPO-GRE阅读PPO - 8ZPIIJSDYW0374EOR

Which of the following best describes the function of the highlighted sentence? A. It articulates a conjecture central to Mather's theory B. It identifies a trait that is thought to be unique to social species. C. It presents evidence that undermines a formerly widely held view. D. It explains the logic underlying a view that has recently been challenged. E. It points out a crucial distinction between cognitively complex species and other species.