Which of the following is considered to be a threat to the internal auditor's objectivity?

Drafting operational procedures for an area and then auditing the same area is considered a threat to an internal auditor's objectivity because the auditor may be auditing their own work. This situation presents a self-review threat, where the auditor's independence can be compromised as they might be biased towards the procedures they themselves have created.

IIA Standard 1120 - Objectivity, which states that internal auditors should not audit their own work or provide assurance on activities for which they were previously responsible.