Comprehensive and Detailed Explanation From Exact Extract:
Ownership of property is established through government-registered legal documents (title or deed records). While board minutes, management confirmation, or title company evidence may be useful, they are secondary. The most reliable and direct evidence is registered ownership documents (A).

According to IIA guidance, reliable information must be factual, adequate, and convincing to ensure that a prudent and informed person would reach the same conclusions as the internal auditor. This means that the information should be supported by sufficient and appropriate evidence that can be independently verified and substantiated. Reliability of information is crucial for the credibility of audit findings and for making informed decisions based on those findings.
Reference:
The Institute of Internal Auditors (IIA) Standard 2310 - Identifying Information: "Internal auditors must identify sufficient, reliable, relevant, and useful information to achieve the engagement's objectives." IIA Practice Guide on "Audit Evidence"

* Introduction:
* Due professional care requires auditors to plan, execute, and document their work meticulously, ensuring that their findings and conclusions are based on a thorough and objective assessment.
* Application of Due Professional Care:
* It involves following a structured approach to audit engagements to ensure that all necessary steps are taken to gather sufficient and appropriate evidence.
* Options Analysis:
* Option A: Detecting irregularities and noncompliance instances are outcomes of the engagement but do not inherently demonstrate due professional care.
* Option B: Lack of significant comments from the supervisor suggests quality but does not demonstrate the systematic approach needed for due professional care.
* Option C: Systematically planning, executing, and documenting audit procedures directly reflects the auditor's adherence to due professional care principles.
* Option D: While important, designing engagement objectives to assist the client does not cover the comprehensive nature of due professional care.
* Conclusion:
* The best demonstration of due professional care during an assurance engagement is the systematic planning, execution, and documentation of audit procedures.
Internal Audit Standards and Practice Guides