The internal audit function is instructed by the audit committee to assess and give an...

The CAE may engage external experts to provide specialized knowledge when the internal audit function lacks expertise. However, the CAE and internal audit activity must remain responsible for the engagement and for forming the final opinion.

Options A and B are inappropriate because they outsource the responsibility and independence of internal audit to the consultant. Option D improperly delegates forming the opinion to an external party. The correct approach is collaborating with the consultant while retaining responsibility (Option C).