According to the Code of Ethics, a professional member's duties include all of the following...

NPPE Codes of Ethics emphasize diligence, competence, integrity, and the protection of public safety, health, and welfare. Professionals are also expected to support sustainable development and the responsible use of natural resources.

Options A, B, and C are all explicitly aligned with ethical duties outlined in NPPE materials. Due diligence and risk management are fundamental professional obligations, and sensible resource development supports sustainability and public interest.

Option D is false. NPPE documents clearly state that achieving the lowest cost is never the highest priority when it conflicts with safety, quality, ethics, or public welfare. Cost considerations must never override professional judgment or ethical responsibility.