When assessing fraud risks, internal auditors should first consider any prior fraud investigations related to the engagement. This approach helps in understanding the historical context of fraud within the organization and identifying patterns or recurring issues that need attention. Reviewing prior investigations (Option B) is a foundational step as it provides a basis for understanding past incidents and informs the assessment of current fraud risks. This is in line with the guidance provided by the IIA, which emphasizes understanding the history of fraud as a critical part of the risk assessment process.
IIA Practice Guide: Internal Auditing and Fraud
IIA Standards, Standard 1210.A2: Internal auditors must have sufficient knowledge to evaluate the risk of fraud

The internal audit charter formally grants the internal audit activity its authority, as per IIA standards. It outlines the audit function's scope, responsibilities, and independence within the organization.

According to the International Standards for the Professional Practice of Internal Auditing, the internal audit activity must have a quality assurance and improvement program that covers all aspects of the internal audit activity. This program should include both internal and external assessments. The chief audit executive must report the results of the quality assurance and improvement program to senior management and the board, including the frequency of quality assessments. This ensures that the board is aware of how often quality assessments are conducted, ensuring continuous improvement and adherence to standards. References: The IIA's International Standards for the Professional Practice of Internal Auditing (Standards), specifically Standard 1312 - External Assessments, and Standard 1320 - Reporting on the Quality Assurance and Improvement Program.

A typical characteristic of an organization ' s risk management framework is that risk is assessed on both an inherent and a residual basis. Inherent risk is the level of risk in the absence of any controls or other management actions influencing the outcome. Residual risk is the risk that remains after controls and other treatment actions are taken. This dual approach helps organizations understand the full spectrum of risk before and after mitigative actions.
Risk management frameworks, including COSO and ISO 31000.