When Applying Both Substituted Judgment and Best Interest Standards to End-Of-Life

When applying both substituted judgment and best interest standards to end-of-life decision making for a patient, what is the nurse's primary role?

A) Tell the proxy what should be done in the best interest of the patient.
B) Establish trust and confidence with the family.
C) Be an advocate and decision maker based on hospital interests.
D) Promote effective communication and decrease conflict.