A Client Tells His Nurse, "I Really Don't Like the Nurse

A client tells his nurse, "I really don't like the nurse on first shift. I was treated badly." Which action should the nurse take as an advocate for this client?

A) Call the agency client advocacy department.
B) Confront the nurse when she comes to work.
C) Tell the client he has the right to switch nurses.
D) Call the local authorities.