Independence of the auditor is part of:

**The reasoning** Auditor independence is a *fundamental ethical principle* in accounting. When an auditor examines a company's financial statements, they must be completely unbiased — not influenced by money, friendship, or pressure. This ensures their report is truthful and reliable. Independence isn't about calculating costs or following tax procedures; it's about *professional integrity* and *trust*. That's why it falls squarely under **ethical standards** like those in the ICAN Code of Ethics or international frameworks (IFAC). **Why the wrong options tempt you** - **A (Cost rules)** tricks you because audits do cost money, but independence is about *behavior*, not pricing. - **C (Tax law)** might seem related since auditors handle financial matters, but tax law governs tax payments, not auditor conduct. - **D (Sales rules)** has nothing to do with auditing — it's a distractor for rushed students. **Quick takeaway** Independence is the auditor's **ethical shield** — it protects the public from fraudulent reports, so it lives in ethical standards, not operational rules.