In which of the following circumstances would a CPA be bound by ethics to refrain from disclosing any confidential information obtained during the course of a professional engagement?

a.The CPA is issued a summons enforceable by a court order that orders the CPA to present confidential information

b.A major stockholder of a client company seeks accounting information from the CPA after management declined to disclose the requested information

c.Confidential client information is requested as part of a quality review of the CPA's practice by a review team authorized by the AICPA.

d.An inquiry by a disciplinary body of a state CPA society requests confidential client information