Comprehensive and Detailed Step-by-Step Explanation:
* Reference to IIA Standards:
* Standard 2120 - Risk Management: Internal audit must assess and evaluate the risk management processes of the organization.
* Identifying risk scenarios supports engagement objectives by determining vulnerabilities and threats to process objectives.
* Reasoning:
* Option Ais correct because risk scenarios provide insights into potential events or conditions that could hinder achieving objectives. This allows auditors to assess risk exposure and evaluate controls effectively.
* Option B(control effectiveness) is a subsequent step in the audit process but does not explain the need for identifying risk scenarios.
* Option Cfocuses on evaluating management's process, which is broader than identifying specific risks for the engagement.
* Practical Application:
* Risk scenarios guide auditors in tailoring their approach to address areas of greatest vulnerability.