Stockholders challenges

[schumi_gmat]

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-fringement 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

OA - D

[vivek.kapoor83]

IMO D.

[aj5105]

pt1>'among' is required

pt2>should end with 'of'

D.

[stop@800]

sales of is correct.
ACE out.

B wrong because company does not includes threats

se we are left with D

[Bidisha800]

If you are wondering why D doesn't have a "were" ( "among them were the threat of a rival’s multibillion-dollar patent-fringement suit and the decline in sales of ), you need to get a grammar book and read about a concept called "Nominative Absolute".

No, this concept is not explained in any of the OAs written by GMAC or by any other test preparation company.