What Is Confidentiality Within the Context of the Practitioner-Client Relationship

What is confidentiality within the context of the practitioner-client relationship?

A) Assurance that the content of the sessions will be shared only on a need-to-know basis.
B) Assurance that the practitioner is confident in his/her ability to aid the client.
C) Assurance that the client's information shared with the practitioner will be kept confidential, secure, and not shared with others unless s/he signs a consent form.
D) Assurance that the relationship will remain confidential and that the practitioner has the ability to build rapport with the client.