【单选题】In the context of personal selling, which of the following is not an effective practice?
A.
Requiring the salesperson to be a representative of the whole company rather than just his or her department
B.
Allowing the sales force to aid in the marketing information function
C.
Expecting salespeople to present the advantages and disadvantages of their products to help the customers buy
D.
Adjusting personal selling techniques according to cultural influences and other factors
E.
Limiting the sales job and selling only to the salespeople in a company