GWD阅读求助

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

E选项无关。原文讲的是bears的movement,没提到habitat怎么怎么样。

luyiqing

但是habitat的情况可以用来说明movement的efficient的呀，而且D感觉跟前面说的矛盾的呀，前面说locomotion是similar的呀。
望NN指教呀

yyt19

就算habitat可能会有影响，这里也没有说明具体情况，不要自己衍生推断，而D是直接说了你想从E推出的结论，肯定选直接明确的选项，文中说的是polar bear similar inefficient，这里比的是black bear，不一样的