Which of the Following Statements About Role Is Not True

Which of the following statements about role is not true?

A) It helps define acceptable behavior for occupants of positions or roles in the channel.
B) A manufacturer's role is to promote its brand effectively.
C) Roles in the marketing channel stay constant over time.
D) Megadealers in the automobile industry want their role to expand so they are included in the decision making process of product development.
E) Allows the channel manager to determine what role a particular channel member is expected to play.