When an employee exploits avulnerability, the most appropriate audit is aforensic audit, as it focuses oninvestigating and documenting security incidentsfor legal or disciplinary action.

Option A (Incorrect):Acompliance auditensures adherence to policies but does not investigate incidents in detail.

Option B (Incorrect):Application security testinghelps identify vulnerabilities but does not addressemployee misuse.

Option C (Correct):Aforensic auditgathersdigital evidence, determines how the exploit occurred, and ensures legal compliance in the investigation.

Option D (Incorrect):Penetration testingidentifies weaknesses but does notanalyze past incidents.