Sanchez's Success Is Due Largely to the Fact That

Sanchez's success is due largely to the fact that:

A) he was born with the personality of a successful salesperson and capitalized on that
B) he understood the key factors involved in becoming an excellent salesperson and worked to develop skills to support those factors
C) he has unlimited energy and makes more cold calls than any other salesperson at his level in the company
D) he knows how to persuade prospects to buy the products he is selling
E) men tend to be more successful at selling industrial products than women are