GWD 22-32 查询过 没有祥解 那位帮忙？

At the annual stockholders meeting, investors heard a presentation on the numerous challenges facing the company, including among them the threat from a rival’s multibillion-dollar patent-infringement suit and the declining sales for the company’s powerful microprocessor chip.

1. including among them the threat from a rival’s multibillion-dollar patent-infringement suit and the declining sales for

2. which includes the threat of a rival’s multibillion-dollar patent-infringement suit and declining sales of

3. included among these the threat from a rival’s multibillion-dollar patent-infringement suit as well as a decline in sales for

4. among them the threat of a rival’s multibillion-dollar patent-infringement suit and the decline in sales of

5. among these the threat from a rival’s multibillion-dollar patent-infringement suit as well as the decline in sales for

答案说是D，不太明白这个句子是什么结构的。

为什么B不对呢？

多谢大牛指点阿

后半句都是在介绍challenges

所以B不对，which就近指代了company

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=48167&page=1

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=58683&page=1

THX