Customers for Complicated Installations and Accessories Usually Expect a Sales

Customers for complicated installations and accessories usually expect a sales rep

A) to know all the technical details of the product.
B) to be able to discuss general business conditions with their top executives.
C) to know the details of the customer firm's particular applications of the product.
D) to use a well-organized sales presentation to get their business.
E) All of these alternatives are correct.