The nurse is caring for a patient who is a well-known surgeon at the hospital. Because of his ...

The nurse is caring for a patient who is a well-known surgeon at the hospital. Because of his status, all the hospital's physicians want to be sure to pay him a visit.
 
  The nurse notices the patient becoming more agitated and withdrawn with each group of visitors. The nurse asks the patient if he would like a Do not disturb sign placed on the door. A few hours later, the nurse notices a physician who is not involved in the patient's care attempting to enter the room. Which response by the nurse is most appropriate?
  a. Allowing the physician to enter because he has higher authority than the nurse
  b. Calling for security to remove the visitor
  c. Firmly explaining that the patient does not wish to have visitors at this time, so do not enter the room
  d. Scolding the physician for not obeying the signs on the door and respecting the patient's wishes.