A marathon runner collapses near the finish line with altered mental status, severe hyponatremia (Na+ 118 mEq/L), and signs of cerebral edema. What is the most appropriate immediate intervention?
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A
Administer isotonic normal saline IV bolus
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B
Restrict all fluids and monitor
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C
Administer hypertonic (3%) saline
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D
Encourage oral water intake