Choice "C" is correct. Tax services may be provided by a registered public accounting firm to the client contemporaneously with the audit when preapproval is granted by audit committee action.Choice "a" is incorrect. The Sarbanes-Oxley Act of 2002 specifically prohibits a registered accounting firm from providing internal audit outsourcing services during an audit.Choice "d" is incorrect. The Sarbanes-Oxley Act of 2002 specifically prohibits a registered accounting firm from providing actuarial services related to the audit contemporaneously with the audit.Choice "b" is incorrect. The Sarbanes-Oxley Act of 2002 specifically prohibits a registered accounting firm from providing advice on financial information system design during an audit.