GMAT逻辑题The prairie vole, a small North American grassland ro

GMAT逻辑题
The prairie vole, a small North American grassland rodent, breeds year-round, and a group of voles living together consists primarily of an extended family, often including two or more litters. Voles commonly live in large groups from late autumn through winter; from spring through early autumn, however, most voles live in far smaller groups. The seasonal variation in group size can probably be explained by a seasonal variation in mortality among young voles.
Which of the following, if true, provides the strongest support for the explanation offered?
(A) It is in the spring and early summer that prairie vole communities generally contain the highest proportion of young voles.
(B) Prairie vole populations vary dramatically in size from year to year.
(C) The prairie vole subsists primarily on broad-leaved plants that are abundant only in spring.
(D) Winters in the prairie voles' habitat are often harsh, with temperatures that drop well below freezing.
(E) Snakes, a major predator of young prairie voles, are active only from spring through early autumn.
正确答案是E,我错选了D,看了一下晚上的解析,有些地方还是有点不明白,能不能帮忙解答一下,
CD论坛上说根据文章所给的信息可得从晚秋到冬天vole的总数量比从春天到早秋的总数量要多,是不是根据“oles commonly live in large groups from late autumn through winter; from spring through early autumn, however, most voles live in far smaller groups.”这句话得到这个结论的（因为我一开始看到这句话的时候不小心又加了自己的想法以及自己的背景知识,所以貌似又想歪掉了.然后再根据文章最后一句话是不是可以得出young vole死亡率高的时候,数量少,死亡率低的时候数量多,那么也就是说是冬天死亡率低,夏天死亡率高.然后E的选项正好能解释为什么春天到早秋死亡率高的原因,也就是捕食young vole造成其死亡率上升,对结论做出了加强,所以E是正确选项,而D的话只说了冬天环境变差,并没有说环境变差与死亡率之间的的关系（在不用背景知识的情况下）,因此不能对结论做出支持,是无关选项,

我觉得你对E答案的分析是对的 对于D 我的想法是 如果D是support结论的 那冬季的种群反而应该更小才对 所以D不是support的
再问： 那也就是说，在不用背景知识的情况下，可以从“voles commonly live in large groups from late autumn through winter; from spring through early autumn, however, most voles live in far smaller groups.”这句话得知冬天的总数量要多于春天到早秋的总数量
再答： 我觉得是的 因为按文中的意思 种群变大是因为幼崽数量多了
再问： 嗯，好的，那是不是也可以这么理解，就是D选项与文中的premise相矛盾了，而premise是被看做绝对真理的，因此与premise相矛盾的选项肯定是错的
再答： 这个题确实是这样