Which statement reflects the Nuremberg Code's requirement for consent?

• A. The voluntary consent of the human subject is not essential.
• B. The voluntary consent of the human subject is absolutely essential... must make an understanding and enlightened decision.
• C. It applies only to non-human research.
• D. The voluntary consent of the human subject is required only for high-risk studies.

Answer: (B)

The key idea is that participation in research by humans must be entirely voluntary and informed. The Nuremberg Code requires that a person freely agrees to participate only after being given sufficient information about what the research involves—its purpose, procedures, duration, risks, potential benefits, and alternatives—and that they understand they can withdraw at any time without penalty. This reflects respect for autonomy: people should make the decision to join research based on a clear, enlightened understanding of what it entails.

That’s why the statement claiming that the voluntary consent of the human subject is absolutely essential and must be an understanding and enlightened decision is the best fit. It captures both the necessity of voluntary participation and the requirement that the decision be informed and comprehended.

Conversely, saying consent is not essential, or that the rule applies only to non-human research, or that consent is needed only for high-risk studies, contradicts the fundamental ethical aim of protecting human subjects through informed autonomy.