An external assessment of an organization's internal audit activity was last completed four years ago...

The IIA's Standards require that an external assessment of an organization's internal audit activity must be conducted at least once every five years. Option A is the only acceptable approach listed that aligns with these standards. It involves conducting a self-assessment with independent validation by a qualified and experienced internal auditor, followed by scheduling an external assessor who is also qualified and independent. This process ensures compliance with the IIA’s requirement for external assessments, maintaining both the credibility and objectivity of the internal audit activity.

The Institute of Internal Auditors (IIA) - Standards for the Professional Practice of Internal Auditing