According to a theory advanced by researcher Paul Martin，the wave of species extinctions that occurred in North America about 11,000 years ago，at the end of the Pleistocene era，can be directly attributed to the arrival of humans，i.e.，the Paleoindians， who were ancestors of modern Native Americans. 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. Still，Krech attributes secondary if not primary responsibility for the extinctions to the Paleoindians，arguing that humans have produced local extinctions elsewhere.But，according to historian Richard White，even the attribution of secondary responsibility may not be supported by the evidence. White observes that Martin's thesis depends on coinciding dates for the arrival of humans and the decline of large animal species，and Krech，though aware that the dates are controversial，does not challenge them；yet recent archaeological discoveries are providing evidence that the date of human arrival was much earlier than 11,000 years ago. 　3. In the last sentence of the passage， the author refers to “recent archaeological discoveries” (lines 27-30) most probably in order to 　　(A) Refute White's suggestion that neither Martin nor Krech adequately account for Paleoindians' contributions to the Pleistocene extinctions 　　(B) Cast doubt on the possibility that a more definitive theory regarding the causes of the Pleistocene extinctions may be forthcoming 　　(C) Suggest that Martin's， Krech's， and White's theories regarding the Pleistocene extinctions are all open to question 　　(D) Call attention to the most controversial aspect of all the current theories regarding the Pleistocene extinctions 　　(E) Provide support for White's questioning of both Martin's and Krech's positions regarding the role of Paleoindians in the Pleistocene extinctions 老师，我在做这道题的时候，首先定位到最后一句觉得没说什么重点，就有个yet转折，可能这是用来驳斥前面的某些观点的。所以看选项找有没有驳斥的意思的， 发现5个选项全都在驳斥。。。心里慌了往前找。再回去找的时候时间已到。我就随便选了个B（时间一到各种混乱），因为在做这篇文章之前，我大体看了下原文，记住了原文讲的是P反驳M，W反驳P。后来答案我也看明白了，我认为我做这道题的思路出现了偏差，我想问一下应该怎么修正。

提问唐老师，这题错选E，题干最后一句Rexecutive 说赢了bid会给公司带来利润，E选项有bid和price就选了，为什么D有关？E无关？

提问唐老师，这道题完全没有思路，看题干最后一句，跟选项如何对应？

提问唐老师，这道题我的做题思路是：题目说一下选项weaken了作者的一个理论，看题干最后一句，我理解的阅读重心是“从安全层面出发的不充分会导致很多后果”，最后对比选项，因为出现“equipment-storage building”我感觉题干没讲就排除BCE，选D，思路哪有问题？

提问唐老师，488根据题目理解为“B和UEP不同意什么看法”回原文定位左边红框地方，但是感觉读下来b并不支持UEP，就有点懵，求问唐老师这题正确解题思路？489，根据题目在讲B的研究，不太清楚定位哪里，求问这题解题思路？

提问唐老师，492根据“scholars”定位到原文第三段“some scholars”理解那句话的意思为“G在自己建造的一个东西的基础上创造了一个东西”，对比选项选的D，提问老师思路的问题出在哪里？

提问唐老师，先跟您说下我的做题思路，首先看题目理解问题是“作者比较可能同意以下关于mtn的？”然后会原文定位到最后一句，有一个impossible，对比选项选了一个有不可能意思的，选了E。后来对答案选D，想问下老师这个思路哪里出了问题？D中past、today‘s gm提到了吗？

小梅老师，选项2老师说除数要大于余数因此余数是0或1，不能确定，但余数应该不可以为0吧，这样的话选项二可以求出余数是1。选D

唐老师，还有这一道题，我是对比范围大小做的，排除了ABCD选的E，但是答案选D，是因为D中“bank对美国经济的影响”比E中“信用卡的扩张对经济的影响”范围更大吗？

唐老师，这是上一道的题目，上面好像没有发出来。

提问唐瑭老师，题目没有看太懂，只知道是一个bank的反面在south做了个啥现在问bank，会原文定位到红框里最后一句话，最后对比选项选了b，求问老师这道题的解题思路？