According to IIA guidance, curiosity is a key attribute that indicates a candidate’s ability to probe further when reviewing incidents that have the appearance of misbehavior. Curiosity drives the auditor to ask deeper questions, seek out underlying causes, and thoroughly investigate anomalies. While integrity (Option A), flexibility (Option B), and initiative (Option C) are important qualities for an internal auditor, curiosity specifically relates to the propensity to investigate and uncover the truth behind incidents.

IIA Standard 1200: Proficiency and Due Professional Care.

IIA Practice Guide on Competency Framework for Internal Auditing.