Leah,a Counsellor,conducts a Session on Alcoholism for the Employees of a Multinational

Leah,a counsellor,conducts a session on alcoholism for the employees of a multinational corporation.She intends to discuss the ill-effects of alcohol consumption on one's physical and mental health.In order to appear credible and persuade her audience,Leah should ________.

A) speak confidently and fluently
B) make direct eye contact with her audience
C) use "you know" and "uh" frequently when speaking
D) convince her audience that she is trying to persuade them