Which of the following situations allows for the most objectivity on the part of an internal auditor?

This chief audit executive (CAE) engaged an internal auditor to consult on an organization's complex information technology system. Shortly after beginning the engagement, the auditor unexpectedly resigned.
Unfortunately, this auditor was the only available auditor with the necessary expertise. The CAE will not be able to hire someone with similar expertise in time to meet a regulatory deadline.
Which of the following would be the best course of action for the CAE to take?

An internal auditor notes that employees are able to download files from the internet. According to IIA guidance, which of the following strategies would best protect the organization from the risk of copyright infringement and licensing violations resulting from this practice?

Performing a monthly analysis of potential duplicate invoices paid to suppliers is an example of which type of fraud control?

According to IIA guidance,which of the following are macro-level audit activities performed for an assurance engagement of the purchasing department?
1.Obtain and review all purchasing-related audit reports issued within the past year.
2.Meet with the quality assurance group to discuss its previous reports of any purchasing-related findings.
3.Review a memo written by the purchasing manager that outlines ongoing problems with the purchasing software.
4.Request a copy of the report from a purchasing audit conducted last year by an external service provider.