GWD 30-Q41:

Elk now live almost solely in the Rocky Mountains, which would make it seem that elk are mountain dwellers, while they once ranged over virtually all of the continental United States except for a small strip in the extreme Southwest.

1. Elk now live almost solely in the Rocky Mountains, which would make it seem that elk are mountain dwellers, while
2. The fact that elk now live almost solely in the Rocky Mountains would make it seem that they are mountain dwellers, but
3. It would seem that elk would be mountain dwellers because of their living now solely almost in the Rocky Mountains, but still
4. Now living almost solely in the Rocky Mountains, it would seem that elk were mountain dwellers, although
5. It seems that elk would be mountain dwellers from the fact that they now live solely almost in the Rocky Mountains, since

 Answer: A

个人感觉答案应该为B，请NN指点！

Ａ　并列. B, 不太符合并列原则．　（ＧＭＡＴ　对并列的重要性比较优先的）．

其次，我个人认为，ＢＵＴ　转折和ＷＨＩＬＥ的不同，ＷＨＩＬＥ　和ＢＵＴ　的感觉是重心变了．（当然这个原则可能用来做题较为牵强）　．

谢谢指点。但A的问题是，用which来指代前面的句子，这在GMAT中也是大忌呀？相比形式上的对成，我总感觉B比A更优！

open to discuss.