Anurse who works in a psychiatric unit is caring for a client who has bipolar disorder. the client comes to the nurse's station at 0300 demanding that the nurse call the provider immediately. which of the following respon the nurse is appropriate? a. "you are being unreasonable, and i will not call your doctor at this hour." b. "go back to your room, and i'll try to get in touch with your doctor." c. "i can't call a doctor in the middle of the night unless it's an emergency." d. "you must be very upset about something."