John Often Uses Humor When Dealing with His Clients at Sanctuary

John often uses humor when dealing with his clients at Sanctuary House because:

A) he is still young and inexperienced.
B) often a serious message can be communicated through kind humor, in particular with teenagers.
C) he wants the teens to see him as a regular person.
D) the teenagers do not have the intellect to grasp a serious message.
E) none of the above are good reasons; humor is inappropriate.