Comprehensive and Detailed Explanation:
An integrated audit approach combines multiple assurance activities (operational, compliance, financial, IT, etc.) into one cohesive engagement. This reduces redundancy, avoids duplicated testing, and minimizes audit fatigue for management and staff. Option A is incorrect because audit conclusions must remain objective, not subjective. Option C is too narrow, as integrated audits go beyond regulatory compliance. Option D is misleading, since integration is about efficiency and coverage, not resource expansion. By integrating multiple areas of risk and control into one engagement, the internal audit function provides a more holistic view, improves efficiency, and reduces the burden on audited departments. Thus, the key benefit is minimizing audit fatigue (B) while maintaining assurance coverage.