Sentence Correction

Dear Friends,

I was having problems in answering the following question.

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 patent-infringement
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


Please help.

OA after some discussions.

My choice was option C

Regards
Deano.