SK提出两条理由,一条是not all。。。 让步反对M关于吃灭绝的观点,另一条是气候climatic change did indeed occur at the end of the Pleistocene. 试图将primary主因归结到climatic change上。 B答案与SK的陈述并没有冲突,我对 Paleoindians made use of the small animals, plants, and insects that became extinct的理解是p与s,p,i的灭绝有关系,但不能说明p就是primary原因,这与SK的观点是吻合的。 而C中climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras,说明气候变化并不是只发生在SK提出的时间里,所以直接将矛头指向SK,因此应该是most weaken。
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