The correct answer is B) maintain an open airway. The first priority in treating a person suspected of having airway burns is to ensure their airway remains open. Airway burns can rapidly lead to swelling and obstruction, which can be life-threatening. Maintaining an open airway by positioning the patient and potentially providing emergency airway management takes precedence over other interventions. The other answer choices, while potentially relevant, are secondary to addressing the airway issue. Applying a cool dressing, providing liquids, or moving to a cool location are important but should only be done after the airway is secured.