The psychiatric nurse is caring for clients on an adolescent unit. Which client requires the nurse's immediate attention?

A. While concerning, a single refusal to eat is not immediately life-threatening. B. While being yelled at could escalate, the situation is not as urgent as others. C. While refusing to participate in group is concerning, it is not immediately life- threatening. D. Pacing in a client with bipolar disorder may indicate agitation or the onset of a manic episode, which could lead to dangerous behavior and requires immediate attention.