A nurse is caring for a client who has bipolar disorder and suddenly begins yelling at staff and other clients. Which of the following actions should the nurse take first?

A. Seclusion may be necessary if the client poses a danger, but less restrictive interventions should be attempted first. B. Restraints are a last-resort intervention used only when less restrictive measures fail and safety is at risk. C. Verbal de-escalation is the first-line intervention for escalating behavior. Using calm communication, setting limits, and reducing stimuli can often prevent further escalation. D. Medication may be required if de-escalation fails, but it is not the initial intervention unless the client poses immediate danger.