A Psychiatrist Has a Duty to Warn of His Patient's

A psychiatrist has a duty to warn of his patient's danger to a third party if ___________.

A) the psychiatrist is absolutely sure the patient will not harm the third person
B) the patient has never harmed others in the past
C) the patient leaves his office with a positive attitude
D) the psychiatrist determines that the patient poses a serious threat of violence to a foreseeable victim or victims