What Allows a Nurse to Exert Coercive Power Over a Client

What allows a nurse to exert coercive power over a client when providing nursing care?

A) The ability to withhold pain medication if the client does not comply with routines
B) The ability to provide the client with additional food when he or she does comply with the nurse's requests
C) The power given to the nurse by reason of state licensure
D) The establishment of a professional and personal relationship with the client