When James talks with Mr. Simpson in Room 110 each evening, he notices that he voices complaints of being unhappy with his roommate. He has had this same complaint for the past few weeks. James decides that maybe Mr. Simpson is really unhappy and not just complaining and talks to his supervisor about a new room assignment. James is acting as Mr. Simpson's __________.
a) Therapist
b) Advocate
c) Case manager
d) Physician