The chief audit executive (CAE) identified an unacceptable risk and believes that the risk is...

When internal audit identifies a risk that appears unacceptable, the CAE should first discuss the matter with the responsible management. This ensures management has an opportunity to explain their rationale or adjust actions before escalation.

Option A (direct escalation to senior management) or Option C (to the board) are appropriate only if management refuses to act. Option B (sending a letter with a deadline) is not aligned with IIA guidance.