Members must maintain client information as:

**The reasoning** This tests a fundamental principle of professional ethics: **client confidentiality**. Whether you're an accountant, lawyer, doctor, or financial advisor, information you gather from clients must be kept **confidential** — meaning private, secure, and only shared with proper authorization. Think of it this way: If you tell your doctor about a health issue, you expect them to keep it private, right? The same applies across professions. Clients trust professionals with sensitive information (financial records, personal details, business secrets). Breaking that trust by making information public or selling it would be both unethical and often illegal. **Why the wrong options tempt you** - **A (Public)**: You might think transparency = good, but making private client data public violates their rights - **C (For sale)**: Some might mistakenly think data can be monetized — that's actually illegal in most professions - **D (Optional)**: This suggests confidentiality is a choice, but it's a mandatory professional duty, not optional **Quick takeaway** Client confidentiality isn't just nice to have — it's the foundation of trust in every professional relationship; break it, and you destroy both your reputation and your career.