While conducting an engagement in the procurement department, the internal auditor noticed that the department...

Identifying the Anomaly: The internal auditor has identified a discrepancy in the travel expenses of the department head, who frequently travels yet reports minimal expenses. This raises a red flag that needs further investigation.

Understanding the Context: It is important to determine if there are legitimate reasons for the discrepancy, such as special arrangements made for senior management travel, which could explain the absence of typical travel expenses like hotels, meals, and transportation.

Appropriate Next Step: Investigating whether there are any special arrangements for senior management travel (Option C) is the most logical next step. This helps in understanding the context and validating whether the discrepancy is justified or indicative of potential issues such as fraud or misreporting.