Which of the Following Statements Is True of a Channel

Which of the following statements is true of a channel used in the communication process?

A) Information received via mass media is more persuasive than information received from personal influence channels.
B) As objections arise and are voiced by buyers, an advertisement can treat the objections in an appropriate manner.
C) A message in a good sales presentation is determined in advance.
D) An advertisement is typically prepared by people who have maximum personal contact with customers.
E) From the standpoint of persuasion, a sales message is more flexible and powerful than an advertisement.