question: Q:A 25-year-old woman comes to the physician because of a 2-week history of episodic bleeding from the nose and gums and one episode of blood in her urine. She was treated with chloramphenicol 1 month ago for Rickettsia rickettsii infection. Her pulse is 130/min, respirations are 22/min, and blood pressure is 105/70 mm Hg. Examination shows mucosal pallor, scattered petechiae, and ecchymoses on the extremities. Laboratory studies show:
  Hemoglobin 6.3 g/dL
  Hematocrit 26%
  Leukocyte count 900/mm3 (30% neutrophils)
  Platelet count 50,000/mm3
  The physician recommends a blood transfusion and informs her of the risks and benefits. Which of the following red blood cell preparations will most significantly reduce the risk of transfusion-related cytomegalovirus infection?"? 
  {'A': 'Leukoreduction', 'B': 'Warming', 'C': 'Washing', 'D': 'Irradiation', 'E': 'Centrifugation\n"'},