Employing an independent consultant to evaluate the information systems audit function every few years is likely to provide most assistance in which of the following areas?

a. Evaluating the quality of work performed on individual information systems audits

b. Determining whether information systems audit reports communicate the findings of audits in a clear, unambiguous fashion

c. Choosing the set of benchmarks that should be used to determine the effectiveness and efficiency of the information systems audit work conducted

d. Evaluating the appropriateness of the audit policies and procedures used to govern the conduct of information systems audit work