Sentence Correction (SC) | Re: At the annual stockholders meeting, investors heard a presentation on

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