In Collaborative Therapy, Therapists Take a Not Knowing Stance

In collaborative therapy, therapists take a not knowing stance. What does this mean?

A) The therapist does not prepare for the session prior to meeting the client
B) The therapist does not assume they understand the client's experience before the client tells them about it
C) The therapist does not know how to make a diagnosis
D) The therapist does not know what the outcome of therapy will be