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?

A. The client is taking numerous deep, measured breaths. This is not an indication of potential violence, but rather a coping strategy to calm down and regulate emotions. B. The client is calmly telling their partner that "the staff here is so controlling." This is not an indication of potential violence, but rather a expression of frustration or dissatisfaction with the treatment setting. C. The client is sitting with their head in their hands and appears to be crying. This is not an indication of potential violence, but rather a sign of sadness or distress. D. The client is pacing around the chair in which their partner is sitting. This is an indication of potential violence, as it shows restlessness, agitation, and possible intimidation of the partner.