Which of the Following Represents a Way in Which a Salesperson

Which of the following represents a way in which a salesperson can ensure a good number of personal contacts in a customer's firms?

A) By using an electronic data interchange system to control communication with the customer
B) By using specialty advertising items to make the selling firm's presence felt in the customer's firm
C) By cultivating three relationships each at three organizational levels of the customer's firm
D) By minimizing the use of strategies like cross-selling,full-line selling,and upselling with the customer's firm
E) By avoiding action on any trust-destroying conflict that the customer may have