A nurse on an inpatient mental health unit is monitoring a visit between a client who has a history of aggressive behavior and the client's partner. Which of the following observations should the nurse identify as an indication for potential violence?

The client is taking numerous deep, measured breaths.

The client is calmly telling their partner that "the staff here is so controlling."

The client is sitting with their head in their hands and appears to be crying.

The client is pacing around the chair in which their partner is sitting.