Bob has been working as a salesman at the same company for over 5 years, but has yet to receive the title of the Best of the Best like his friend, Bill. Bob considers himself good because he knows a lot about his company and how to implement fundamental selling skills. What is the difference between Bob, a good salesman, and Bill, the Best of the Best?

A. Bill reads and knows more about the company's products and about technology in general

B. Bob doesn't know how his customers' companies work

C. Bob doesn't implement the fundamental selling techniques the same way as Bill

D. Bill knows and is liked by more people in higher positions