Which statement about research participants is true?

• A. They accept risks in the hopes that doing so will benefit themselves and/or others
• B. Prisoners have the right to serve as research participants
• C. They cannot withdraw once enrolled
• D. Informed consent is optional

Answer: (A)

The key idea is autonomy and risk-benefit decision-making in research. People who participate knowingly accept certain risks because they hope to gain something themselves or to help others. This voluntary choice rests on understanding what the study involves and the potential benefits and harms, which is why informed consent is central.

It’s not accurate to say prisoners have an unconditional right to participate; their inclusion is heavily safeguarded because they are a vulnerable population, and participation must be voluntary with extra ethical protections. It’s also false that participants cannot withdraw once enrolled; they may withdraw at any time without penalty, and researchers must honor that choice. Finally, informed consent isn’t optional; it isn’t something that can be skipped in ordinary research—participants must be informed and freely consent unless a very specific IRB-approved exception applies.