帮忙回答一下GWD的题目，谢谢啦

luyiqing

However, although polar bears’ locomotion is similarly inefficient, polar bear cubs walk along with their mother.  
Furthermore, the daily movements of sloth bears and American black bears which are similar in size to sloth bears and have similar-sized home ranges reveal similar travel rates and distances, suggesting that if black bear cubs are able to  keep up with their mother, so too should sloth bear cubs.
GWD6-Q11:
Which of the following, if true, would most weaken the author’s argument in lines 18-26 (“Furthermore … sloth bear cubs”)?
A.    Cub-carrying behavior has been observed in many non-myrmecophagous mammals.
B.    Many of the largest myrmecophagous mammals do not typically exhibit cub-carrying behavior.
C.    Some sloth bears have home ranges that are smaller in size than the average home ranges of black bears.
D.    The locomotion of black bears is significantly more efficient than the locomotion of sloth bears.
E.    The habitat of black bears consists of terrain that is significantly more varied than that of the habitat of sloth bears.
答案是D，我想选E，前面不是说了polar bears’ locomotion is similarly inefficient嘛

songer_xj

这道题应该发到逻辑区，或许有更多的人给你解答。

问题问的是“Furthermore … sloth bear cubs”，即，（前提：）s bears和b bears在daily movement上有点什么相似，（结论：）暗示了如果b bear的cub怎样，那么s bear的cub就怎么样。答案D给出了他因，说b bears比b bears怎样，即是有差异的（不相似）。进而削弱了结论。
E选项好像完全不沾边啊。

luyiqing

但是E说了地形的原因，从而也可以使b bears 和S bears 不一样呀？这也算给出他因嘛

luyiqing

我好像知道了，E的话说地形原因导致，但是这样的话 black bears' 得mother也一样走得慢了，小bear也一样有可能跟的上了，对吗？

songer_xj

我好像知道了，E的话说地形原因导致，但是这样的话 black bears' 得mother也一样走得慢了，小bear也一样有可能跟的上了，对吗？

-- by 会员 luyiqing (2010/5/7 18:12:28)

这是你自己的推测，凡是用自己推测出来的东西去解题，都是错的。选项给了什么，你就把它说的什么放到原文中，看是削弱还是加强。不要用发散思维了。

luyiqing

那E怎么排除呀？

luyiqing

请各位赐教呀