A 60-year-old female comes to the physician because of fever, chills, and a cough for the past 2 weeks. She lives at home with her husband, has no chronic medical conditions, and has not traveled recently. She does not smoke cigarettes or drink alcohol. Her temperature is 38.2°C (100.8°F). Physical examination reveals altered breath sounds. Chest x-ray is abnormal. Which of the following is the most likely causal organism?

1. A)Haemophilus influenzae
2. B)Streptococcus pneumoniaeGABARITO
3. C)Mycoplasma pneumoniae
4. D)Staphylococcus aureus
5. E)Chlamydophila pneumoniae