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?

The nurse understands that clients require variable amounts of personal space and accepts the behavior.

The nurse confronts the client and states that they will be secluded if behavior continues.

The nurse ignores the behavior because the nurse does not want to anger the client.

The nurse expresses a sense of discomfort and sets limits on the behaviors.