Comprehensive and Detailed Step-by-Step Explanation:
* Reference to IIA Standards:
* Standard 2210 - Engagement Objectives: Audit objectives must align with the engagement scope and focus on evaluating compliance, efficiency, and effectiveness.
* Reasoning:
* Option Cis correct because assessing compliance with HR policies is a specific, measurable, and relevant objective aligned with internal audit's role in evaluating governance and control processes.
* Option A(analyzing turnover rates) is more investigative and does not align with assessing processes or compliance.
* Option B(evaluating common practices) is vague and lacks a clear link to controls, policies, or risks.
* Impact of Clear Objectives:
* Well-defined objectives, like compliance assessment, ensure the audit delivers actionable insights and adds value to the organization.