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]

 为什么不是b呢？presentation的内容不使用which连接么？用among是什么意思呢？那里面的指什么呢？怎么翻译这句话呢？thanks a lot