[求助]就不信你们都懂了！！GWD逻辑6-Q7

 However, anthropologist Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them. Nor were extinctions confined to large animals: small animals, plants, and insects disappeared, presumably not all through human consumption. Krech also contradicts Martin’s exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene

原文问,怎么削弱M的观点, 文章中M后边就直接来了一个转折,有一个牛人S出来说M不对,那削弱自然是要看S说了什么

C选项的气候变化问题是S所驳斥的,所以是支持M的而非削弱