请指教：FeiFei-36

36. Sometimes when their trainer gives the hand signal for “Do something creative together” two dolphins circle a pool in tandem and then leap through the air simultaneously. On the other occasions, the same signal elicits synchronized backward swims or tail-waving. These behaviors are not simply learned responses to a given stimulus. Rather, dolphins are capable of higher cognitive functions that may include the use of language and forethought.

Which one of the following, if true, most strengthens the argument?

A.        Mammals have some resemblance to one another with respect to bodily function and brain structure.

B.        The dolphins often exhibit complex new responses to the hand signal.

C.        The dolphins are given food incentives as part of their training.

D.       Dolphins do not interact with humans the way they interact with one another.

E.        Some of the behaviors mentioned are exhibited by dolphins in their natural habitat

思路：直接提出另一个事实，若此事实际能够说明结论成立的，则此事实为答案。

A.        没有提及cognitive functions，对结论无关。

B.         选项中的“new responses”，说明了dolphins能够经过思考，再作出一个新的反映，而不是单单的作出learned responses to a given stimulus. 此选项支持了结论中的cognitive functions，是答案。

C.         无关。

D.        interact的方式不一定与cognition有关，也可能会与learned responses或条件反射有关。

E.         无关。

本题有两结论：1，These behaviors are not simply learned responses to a given stimulus      2，Rather, dolphins are capable of higher cognitive functions that may include the use of language and forethought

为什么E无关？我觉得：E可支持结论1，不能支持2。

                     B可可支持结论2，不能支持1。

请大N们帮帮我。谢谢！

即使是在自然生活中可能展示的动作，也不能证明这个动作不是因为外界刺激学来的，因为文章中没有可以排除这个可能性的内容。