The correct answer is A. The NASW Code of Ethics Standard 1.07 (a) states that 'Social workers should respect clients' right to privacy. Social workers should not solicit private information from clients unless it is essential to providing services or conducting social work evaluation or research...'
B is incorrect because the legal 'minimum necessary' principle, which is based on HIPAA, establishes that a health care practitioner should divulge the minimum amount of confidential information necessary to achieve a specific purpose such as child abuse reporting, responding to a court order, or making a Tarasoff warning.
B and C are both incorrect because the 'minimum necessary' principle does not address the issue of pursing information about a client. It addresses the issue of revealing information about a client that has already been obtained.
D is incorrect because confidentiality, which is both a legal and ethical principle, also addresses the issue of revealing information about a client that has already been obtained.