A nurse in a mental health facility is caring for a client who is being aggressive toward other clients. Which of the following actions is the priority for the nurse to take?

The correct answer is B: Ask the client if he intends to harm others. This is the priority action because it directly addresses the safety of other clients. By asking about the client's intentions, the nurse can assess the level of risk and take appropriate measures to prevent harm. The other choices are less critical in this situation. A (suggest making a list of things that make him angry) and D (assist in exploring techniques to reduce stress) are important in managing aggression but do not address immediate safety concerns. C (role modeling healthy ways to express anger) may be helpful in the long term but does not address the current risk of harm to others.