Unless It Is Either Impossible or Contraindicated, at What Point

Unless it is either impossible or contraindicated, at what point in therapy is the psychologist required to discuss the subject of confidentiality with a client?

A) Before treatment begins.
B) Early in treatment, as soon as the client shows evidence of being open to receiving help.
C) As soon as the subject of confidentiality is brought up by the client.
D) At the conclusion of treatment.