A nurse is communicating with a client on an inpatient psychiatric unit. The client moves closer and invades the nurse's personal space, making the nurse uncomfortable. Which is the most appropriate intervention?

Choice A reason: While it is true that clients may have different perceptions of personal space, accepting behavior that causes discomfort or violates boundaries is inappropriate. It may compromise therapeutic rapport and safety. Choice B reason: Threatening seclusion is punitive and escalates the situation. It does not model therapeutic communication or boundary setting and may provoke fear or aggression. Choice C reason: Ignoring the behavior avoids addressing the boundary violation and may reinforce inappropriate conduct. It also fails to protect the nurse’s emotional and physical safety. Choice D reason: This is correct. Expressing discomfort and setting clear, respectful limits maintains professional boundaries and models appropriate interpersonal behavior. It promotes safety and therapeutic engagement while respecting both parties.