A 68-year-old male with acute myelogenous leukemia presents with a fever to 100.6° Fahrenheit. He complains of feeling fatigued. His past medical history reveals no prior infections. The patient's vital signs are notable for a blood pressure of 86/40 mm Hg. On exam, the patient can state his name but cannot name the location or date. A chest radiograph shows diffuse pulmonary infiltrates. His white blood cell count is 4000 cel/microl with 10% polymorphonuclear cells. Which of the following is the next step in management?
A. Initiate intravenous vancomycin and piperacillin-tazobactam
B. Await the results of blood cultures before starting antibiotics
C. Initiate intravenous celepime monotherapy Initiate intravenous linezolid monotherapy