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) All of the above are likely to be expected.
E) None of the above is likely to be expected.