A message presenting only one side of an issue will be more effective than a two-sided communication if

A、
the issue is of great personal significance to the audience and tends to elicit strong emotion.
B、
the communicator has only moderate credibility or attractiveness.
C、
the audience tends to agree with the advocated position and will not hear the opposing side.
D、
the audience is well-informed and is already aware of the opposing arguments.