Problem: A 3-year-old has a two-day history of runny nose, low-grade fever, and a "barky" cough at night. The child is awake and alert with noted stridor. Pulse oximetry is 96% on room air. Which of the following interventions would be the most appropriated for this child? A. Delivery of humidified oxygen by nasal cannula B. Administration of nebulized epinephrine C. Suctioning secretions from the oropharynx D. Administration of albuterol with a spacer