A 28-year-old female with a history of asthma presents to the ED with severe shortness of breath, wheezing, and inability to speak in full sentences. Her peak expiratory flow (PEF) is 40% of her personal best. Oxygen saturation is 90% on room air. What is the most appropriate immediate intervention?

✓ Correct Answer: Option B

For a severe asthma exacerbation, immediate and aggressive bronchodilation is critical. Continuous nebulized albuterol provides potent and sustained bronchodilator effect. Oxygen therapy should also be initiated simultaneously. Corticosteroids and magnesium sulfate are important but follow bronchodilators.