<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 35-year-old soldier is rescued from a helicopter crash in the Arctic Circle and brought back to a treatment facility at a nearby military base. On arrival, the soldiers wet clothes are removed. He appears pale and is not shivering. The patient is unresponsive to verbal or painful stimuli. His temperature is 27.4C 81.3F, the pulse is 30min and irregular, the respiratory rate is 7min, and the blood pressure is 8352 mm Hg. Examination shows fixed, dilated pupils, and diffuse rigidity. The fingers and toes are white in color and hard to touch. An ECG shows atrial fibrillation. In addition to emergent intubation, which of the following is the most appropriate next step in patient management?? A: Application of heating pads to the extremities, B: Emergent electrical cardioversion, C: Increasing the room temperature, D: Intravenous administration of tissue plasminogen activator, E: Intravenous administration of warmed normal saline,  <response>: This is a question about the management of severe hypothermia. The patient is described as having a core body temperature of 27.4C, bradycardia, hypotension, fixed dilated pupils, rigidity, and evidence of peripheral circulatory collapse. These findings are consistent with profound hypothermia. The question asks about the most appropriate next step after emergent intubation.Choice A of applying heating pads would not be appropriate as aggressive external rewarming could cause reflex vasodilation and hypotension. Choice B of electrical cardioversion is not indicated since the patient is in atrial fibrillation likely secondary to hypothermia. Cardioversion would not treat the underlying problem.Choice C of simply increasing room temperature would not provide adequate rewarming.Choice D of giving IV tPA would not be appropriate in this setting as there is no evidence of a thrombotic process requiring thrombolysis. Choice E of giving warmed IV saline would be the best option. In profound hypothermia, the goal is gentle internal rewarming such as with warmed IV fluids. This helps increase core body temperature without causing reflex vasodilation.E: Intravenous administration of warmed normal saline 