Which ot the following circumstances impairs an auditor's independence Select one a. Litigation by an audit firm against a client claiming management fraud or deceit Litigation by a client against an audit fimy claiming a deficiency in the previous audit and Litigation by an audit firm against a client claiming management fraud or deceit Litigation by a client against an audit firm related to tax services a Litigation by a client against an audit firm claiming a deficiency in the previous audit Independence is required of a CPA when performing Select one: a. external audits b. all attestation and tax services O c. all professional services d. all attestation services