A known alcoholic appears at the emergency department with chest pain, a 40°C/104°F fever, chills, and a productive cough. He has no history of chronic pulmonary disease. There are red blood cells an encapsulated Gramnegative rods in the sputum. The symptoms are most likely caused by
A) Haemophilus influenzae B) Klebsiella pneumoniae C) Nocardia asteroides D) Pseudomonas aeruginosa