The Licensed Practical/vocational Nurse (LPN/LVN),as a Regular Staff Member,knows All

The licensed practical/vocational nurse (LPN/LVN) ,as a regular staff member,knows all the patients and anticipates many of their needs.Other staff members are comfortable asking for advice.The advice is given freely with a clear explanation or demonstration or both.This nurse can be said to be acting in the role of a(n) :

A) Self-appointed teacher
B) Management-assigned instructor
C) Informal leader
D) Designated supervisor