Comprehensive and Detailed Step-by-Step Explanation:
* Reference to IIA Standards:
* Standard 2200 - Engagement Planning: Internal auditors must develop a plan that considers the objectives, risks, and controls of the area being audited.
* Standard 2210 - Engagement Objectives: The objectives of the engagement must be aligned with the organization's processes and risk management practices.
* Reasoning:
* Option C is correct because understanding the process's objectives and associated risks allows the auditor to design procedures to assess how well risks are managed and objectives are achieved.
* Option A (mission, vision, and strategic objectives) provides organizational context but does not give detailed insights into the specific process.
* Option B (management's opinion) is subjective and insufficient for developing a comprehensive understanding of the process.
* Effective Engagement Planning:
* Focus on process-specific objectives, risks, and controls ensures a targeted and effective audit, contributing to meaningful outcomes.