Several of the nurse's coworkers constantly complain about everything and they try to get the nurse ...

Several of the nurse's coworkers constantly complain about everything and they try to get the nurse to join them.
 
  The nurse has always been a happy and positive person and wants to enjoy his time at work, especially since this is his first job. What should be an appropriate first step in the situation?
  A) Let the complainers know that he will work with them but that he doesn't wish to join them in complaining.
  B) Ask for a transfer to another unit within the facility where the staff is more positive.
  C) Discuss his concerns with his nurse manager or the unit supervisor.
  D) Contact a nursing organization with his concerns