How Should Human Service Professionals Regard Consultation Activities and Supervision

How should human service professionals regard consultation activities and supervision?

A) Because one needs continuing education to maintain certification or licensure, these activities should be engaged in just to maintain these credentials.
B) These are good "extra" responsibilities, but are not necessary to maintain professional competence.
C) Consultation and supervision are required components of the human service professional's career responsibilities.
D) These activities should be actively sought out and taken advantage of.