请教一题prep语法题

AccyFin

GWD-8-Q32:
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.


A. including among them the threat from a rival’s multibillion-dollar patentinfringement suit and the declining sales for

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

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

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

E. among these the threat from a rival’s multibillion-dollar patent-infringement suit as well as the decline in sales for
D中的them不是会指代不清吗，因为前面的句子有两个复数名词啊？这些代词指代还是搞不清楚。

sdfzcjy

GWD-8-Q32:
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.


A. including among them the threat from a rival’s multibillion-dollar patentinfringement suit and the declining sales for

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

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

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

E. among these the threat from a rival’s multibillion-dollar patent-infringement suit as well as the decline in sales for
D中的them不是会指代不清吗，因为前面的句子有两个复数名词啊？这些代词指代还是搞不清楚。

-- by 会员 AccyFin (2011/3/23 13:47:10)

投资者有些挑战，挑战包括两个方面，一个是the threat 什么什么，一个是the decline 什么什么，后面两个方面是对应的，而5个选项当中，对应最好的只有D咯

还有as well as什么的感觉N不爽，前面不管用including、included、which都会让人想一会，用THEM也是咯，所以都差不多，不用这个比

cocoloop

不是them前有多于一个的复数名词就会指代不清，要根据句意判断，真的会对理解造成影响才有可能错误。the threat, the decline 只可能among challenges,而不会among investors.另外用排除法也能很快得到答案，include和among重复，among these必错，which定语从句离先行词太远，而且还是单数形式。

AccyFin

懂了，谢谢

fhxywei

D选项究竟算一个什么成分？


-------，the threat of a rival’s multibillion-dollar patent-infringement suit and the decline in sales of the company’s powerful microprocessor chip （are）among them.

还原成上面，看成独立主格结构修饰前面的主句？

看成 prepositional phrase 好像也不像，后面这一半究竟看成是个什么成分呢？