Which of the following most appropriately describes circumstances in which the external auditor is likely to rely on the work of a clients internal audit function?

Select one:

a. The internal audit function undertakes controls testing and comprehensively documents all procedures and results.

b. The internal audit functions reports functionally to the CFO and the CEO and periodically to the audit committee.

c. The internal audit function has expanded its role in providing assurance to the board on operational controls and opportunities to improve the organisations efficiency.

d. The board has approved for increased resourcing from the internal audit function to increase its headcount.