You are asked to assess a 34-year-old homeless man admitted through the ER with an abrupt onset of chills and fever. He has bilateral rhonchi with a productive cough. His SpO2 is 88% on room air. What should you recommend?

A. intubate and provide mechanical ventilation with 40% O2B. institute noninvasive positive pressure ventilation via nasal maskC. provide O2 therapy, give an antibiotic, and obtain sputum for C&SD. implement postural drainage and percussion with directed coughing