A 26-year-old healthy male smoker presents with sudden-onset shaking chills, fever to 103.0°F, cough, and left-sided pleuritic chest pain. A chest x-ray shows focal consolidation in the left lower...

A 26-year-old healthy male smoker presents with sudden-onset shaking chills, fever to 103.0°F, cough, and left-sided pleuritic chest pain. A chest x-ray shows focal consolidation in the left lower lobe. Which organism is least likely to be causative?

A. S. pneumoniae

B. H. influenza C.