A 3-year-old child presents with barking cough, inspiratory stridor at rest and moderate respiratory distress but oxygen saturations 95 percent on air. What is the most appropriate treatment?AOral Dexamethasone single doseBOral Amoxicillin for 7 daysCImmediate intubation and ventilationDHigh-dose inhaled SalbutamolENo treatment; observe onlyCheck my answer