Answer: (B). provides credentials establishing the sources as reliable and credible
Explanation: Discerning Listeners are concerned about getting all the information. They clearly focus on any conversation or presentation and they frequently take notes so that they will not forget the message being passed across to them. However, discerning listeners usually remember the speaker's appearance, behavior, and voice as a result of the full attention they show.
The discerning listener is an individual who listens with complete attention to the message passed by the speaker, the individual sifts the message for what is best, acts on it with extreme grace.