A 2-year-old boy presents to the emergency department with a barking cough for the past 2 days. Vital signs include a heart rate of 140 bpm, respiratory rate of 30 breaths per minute, pulse oxygenation of 97% on room air, and temperature of 100.8°F. Physical examination reveals a boy in minimal distress with a high-pitched sound during inspiration and expiration at rest, best heard over the anterior neck. His oropharynx reveals minimal erythema with no exudate. You also notice that his intercostal muscles are mildly sucked inward during respiration. Which of the following is the recommended initial treatment for this patient based on the most extensively studied scoring system for this condition?ANebulized albuterolBOral dexamethasoneCOral dexamethasone and nebulized epinephrineDOral dexamethasone, nebulized epinephrine, and endotracheal intubationEOral prednisolone and nebulized albuterol

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