What Was One of the Reasons for Jerry Yang's Failure

What was one of the reasons for Jerry Yang's failure at Yahoo?

A) Jerry made many necessary changes to the company's organizational structure.
B) Jerry established a successful organizational structure and culture, but could not assert control.
C) Jerry's preference for obtaining consensus among his managers led to bickering and infighting.
D) Jerry focused most strategic changes on improving user experience and increasing advertising revenues.