GWD17-Q14-代词指代

GWD17-Q14:

Whereas lines of competition are clearly defined in the more established industries, in the Internet industry they are blurred and indistinct, as companies that compete one day may be partners the next.

A.    Whereas lines of competition are clearly defined in the more established industries, in the Internet industry they are blurred and indistinct, as companies that compete

B.    Although the lines of competition are clearly defined in industries that are more established, they are blurred and indistinct in the Internet industry, as competing companies

C.    The lines of competition are clearly defined in the more established industries, unlike the Internet where they are blurred and indistinct, as companies that compete

D.    Unlike more established industries, where the lines of competition are clearly defined, they are burred and indistinct in the Internet industry, as companies that compete

E.     Unlike more established industries, with clearly defined lines of competition, those of the Internet industry are blurred and indistinct, as competing companies

答案是B

我的困惑是A和B中的they指代没有歧义吗?个人认为可以指代lines,也可以指代established industries,望牛人指正!

觉得指代到没有歧义

不明白为什么选B而不选A

没有人能解答这个题么

查了好多帖子，都没有定论

B为什么错，我的看法：

whereas 和although基本没有分别；they指代都正确。问题在：原句…as companies that compete one day may be partners the next.(day)   因为某一天这个公司还在与我们竞争也许明天就变成伙伴。One day 修饰竞争这个动作

B篡改原意：as competing companies one day maybe partners the next. one day       修饰companies,不合理。要么修饰整个as从句，更说不通。

而且whereas 也更合理写，强调对比嘛。