A Patient Presents with a Cough and Fever

A patient presents with a cough and fever. The provider auscultates rales in both lungs that do not clear with cough. The patient reports having a headache and sore throat prior to the onset of coughing. A chest radiograph shows patchy, nonhomogeneous infiltrates. Based on these findings, which organism is the most likely cause of this patient's pneumonia?

A) A virus
B) Mycoplasma
C) S. pneumoniae
D) Tuberculosis