Which of the Following Statements About Personal Selling Is True

Which of the following statements about personal selling is true?

A) Personal selling would play a dominant role in a company that sells inexpensive plastic toys.
B) The role of personal selling would be minimized in a company that sells component parts to auto manufacturers.
C) Since personal selling makes a valuable contribution to an organization's promotional program,the firm's advertising department should contribute to the personal selling effort.
D) In an integrated marketing communications program,personal selling is a substitute for other promotional mix elements.
E) All of the above statements about personal selling are true.