If information systems auditors perform a staff function, which of the following aspects of leadership is likely to be most difficult to accomplish?

a. Motivating information systems auditors to undertake audit work in technical domains where they have little experience

b. Ensuring that information systems auditors achieve the objectives of the audit in which they participate rather than pursuing their own agenda

c. Motivating information systems auditors to compare their performance against benchmarks they establish for themselves

d. Ensuring that information systems auditors maintain a commitment to maintaining their professional competence