Which of the Following Statements Describes an Argument Used by Either

Which of the following statements describes an argument used by either the opponents or the proponents of the use of a single agency to provide all integrated marketing communication services for a client?

A) Proponents of this approach argue that using one agency allows for greater control of and more synergy among each of the communication elements.
B) Opponents of this approach argue it is an attempt by ad agencies to retain business that might otherwise be lost to other communication service companies.
C) Opponents argue that the approach does not work well due to internal conflicts within the various departments of these agencies.
D) Proponents of the system argue the one-stop shop makes it more convenient for the client to coordinate all of its marketing efforts.
E) All of the above statements reflect arguments for and against using a single agency to provide all integrated marketing communication services for clients.