To Bring a Civil Lawsuit Against a Therapist for Professional

To bring a civil lawsuit against a therapist for professional malpractice, which condition is required?

A) The plaintiff must be contemplating having a professional relationship with the therapist.
B) There must have been negligence in the care of the client that resulted in harm to the client.
C) There must be a correlational relationship between the therapist's negligence and any harm suffered by the client.
D) There must have been some breach of confidentiality by the therapist.