Which Objective(s)apply to ,both an Assessment Interview and a Psychotherapeutic

Which objective(s) apply to ,both an assessment interview and a psychotherapeutic interview?

A) To establish and maintain a professional relationship.
B) To guide and promote behavioural, cognitive, and emotional change.
C) To obtain information necessary to formulate a diagnosis, develop a case formulation, determine treatment options (including possible need for referral)
D) To ensure that sufficient information is gathered in a relatively brief time period (often one or two sessions) .