Comprehensive and Detailed Step-by-Step Explanation:
* Reference to IIA Standards:
* Standard 2210 - Engagement Objectives: Internal auditors must establish objectives for each engagement to align with the organization's goals and address identified risks.
* Reasoning:
* Option Ais correct because engagement objectives focus on ensuring audit procedures target and mitigate identified risks effectively.
* Option B(common understanding) is important for team alignment but is secondary to risk- focused objectives.
* Option C(considering work of other assurance providers) is part of planning but not the primary purpose of setting objectives.
* Importance of Objectives:
* Engagement objectives drive the audit's focus, ensuring that procedures are purposeful and tailored to mitigate relevant risks.