Steve Woodworth, the founder and chief executive of Pan-Asian Imports, a Hong Kong-based business that imports and exports computers, networking devices, and fiber optic switches, and will be leading the technology conference in San Francisco next week.

The portion in red is an extended MODIFIER describing the subject (Steve Woodworth) and the company that he founded (Pan-Asian Imports).

If we omit this modifier in the answer choices, we get:

A) Steve Woodworth and will be leading the technology conference
B) Steve Woodworth and he will be leading the technology conference
C) Steve Woodworth he will be leading the technology conference
D) Steve Woodworth will be leading the technology conference
E) Steve Woodworth leading the technology conference

In A, B, C and E, the subject (Steve Woodworth) lacks a verb.
Eliminate A, B, C and E.

The correct answer is D.

Steve Woodworth, the founder and chief executive of Pan-Asian Imports, a Hong Kong-based business that imports and exports computers, networking devices, and fiber optic switches, and will be leading the technology conference in San Francisco next week.

A) switches, and will be leading

B) switches, and he will be leading

C) switches; he will be leading

D) switches, will be leading

E) switches, leading

D is the answer for and should be eliminated in it. It is not useful because of "a Hong Kong-based business that imports and exports computers, networking devices, and fiber optic switches" is a phrase to support the subject and can be eliminated.