A nurse is caring for a client who is experiencing a manic episode. Which of the following actions should the nurse take first?

Choice A reason: Supervised physical activity may be beneficial later to channel excess energy, but it does not address the immediate need to reduce overstimulation, which can worsen manic symptoms. Choice B reason: Maintaining a calm attitude is essential for therapeutic communication; however, it is not the highest-priority initial intervention when managing acute mania. Choice C reason: Decreasing environmental stimuli is the priority intervention because excessive noise, light, and activity can intensify manic behaviors. A low-stimulus environment promotes safety, reduces agitation, and helps prevent escalation. Choice D reason: Encouraging rest is important, but manic clients often cannot rest until environmental stimuli are controlled. Rest becomes more achievable after stimulation is reduced.