Which characteristic is most likely to enhance the credibility of the source of a persuasive message

A)  friendliness 
B)  trustworthiness 
C)  height 
D)  physical attractiveness

Trustworthiness is the most important characteristic that enhances the credibility of the source of a persuasive message. It is essential for the source to be perceived as honest, reliable, and having expertise in the subject matter to gain the trust of the audience. Friendliness, height and physical attractiveness may influence likability and attractiveness, but they do not necessarily indicate credibility.