Under Which of the Following Circumstances Can a Therapist Divulge

Under which of the following circumstances can a therapist divulge information about a client to a third party?

A) if the third party is a qualified psychiatrist or psychologist
B) if the therapist thinks such consultation is in the best interest of the client
C) if the therapist has reason to believe that the client presents a danger to himself or herself or may potentially harm someone else
D) if the therapist is a professor and will use the information to teach