A nurse is assessing a client who has bipolar disorder and is experiencing mania. Which of the following findings is the priority for the nurse to report to the provider?

Choice A reason: Sleeping only 4 hours is common during mania and contributes to exhaustion, but it is not immediately life-threatening. Choice B reason: Refusing to shower reflects poor self-care, which is expected in mania, but it does not pose an acute medical risk. Choice C reason: Eating half a snack shows reduced intake but is not as urgent as fluid refusal. Choice D reason: Refusing fluids is the priority because dehydration can quickly lead to severe complications such as electrolyte imbalance, cardiac dysrhythmias, and renal impairment. This requires immediate intervention.