Rationale: A. Nonmaleficence refers to the ethical principle of avoiding harm or preventing injury. By removing a fall hazard, the nurse is actively working to prevent harm to the client. B. Veracity means telling the truth and being honest with clients, which is not demonstrated in this scenario. C. Utility focuses on the greatest good for the greatest number, not on preventing individual harm in a direct care setting. D. Autonomy is respecting the client’s right to make their own decisions about care, but it does not apply to removing environmental hazards.