According to IIA guidance, which of the following statements is true with regard to the chief audit executive's (CAE's) responsibility for conducting a self-assessment of the internal audit activity?
1 The CAE should select an independent reviewer or review team to perform sufficient tests of the self- assessment to validate the results
2 The CAE should validate results by engaging experienced audit professionals from a separate internal audit activity outside of the organization to reperform all of the tests conducted for the assessment
3. The CAE should select independent, nonaudit professionals who are knowledgeable about the organization and the industry in which it operates to assist with performing the self-assessment
4. The CAE may consider performing a self-assessment with independent external validation in Iieu of performing a full external assessment