question: Q:A 70-year-old man presents to the physician with a 1-month history of severe fatigue. During this time, he has unintentionally lost 2 kg (4.4 lb). Currently, he takes no medications other than aspirin for occasional knee pain. He does not smoke or drink alcohol. His vital signs are within the normal range. On physical examination, the conjunctivae are pale. Petechiae are present on the distal lower extremities and on the soft and hard palates. Palpation reveals bilateral painless cervical lymphadenopathy. Examination of the lungs, heart, and abdomen shows no abnormalities. Which of the following factors in this patient’s history or laboratory findings would most likely indicate a good prognosis?? 
  {'A': 'History of myelodysplastic syndrome', 'B': 'Leukocyte count > 100,000/mm3', 'C': 'Philadelphia chromosome', 'D': 'Prior treatment with cytotoxic agents', 'E': 'Translocation t(15;17)'},