In his efforts to serve the interest of the public, the engineer should ______.

• A. Extend public knowledge and appreciation of engineering and its achievements
• B. Adhere to the principles of sustainable development
• C. All of the above
• D. None of the above

Answer: (C)

The main idea is that engineers serve the public by both informing society about engineering and by making choices that uphold sustainable development. Extending public knowledge and appreciation helps people understand what engineering does, its benefits, and its risks, which supports informed decision-making and accountability. Adhering to sustainable development brings in the long-term perspective, ensuring projects protect health and safety, conserve resources, and balance environmental, social, and economic needs for present and future generations.

Because both actions reflect essential ways engineers contribute to public welfare, the best answer is the one that includes both. If you emphasized only education, you’d miss the long-term responsibility to sustainability; if you emphasized only sustainability, you’d miss the value of public understanding and trust. Together, they fully capture how engineers serve the public.