A 32-year-old man presents with a 2-week history of productive cough, low-grade fever, and myalgias. Chest X-ray shows a diffuse interstitial pattern. The most likely causative organism is:
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A
Streptococcus pneumoniae
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B
Mycoplasma pneumoniae
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C
Staphylococcus aureus
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D
Klebsiella pneumoniae