question: Q:Two hours after admission to the intensive care unit, a 56-year-old man with necrotizing pancreatitis develops profound hypotension. His blood pressure is 80/50 mm Hg and he is started on vasopressors. A central venous access line is placed. Which of the following is most likely to decrease the risk of complications from this procedure?? 
  {'A': 'Initiation of anticoagulation after placement', 'B': 'Initiation of periprocedural systemic antibiotic prophylaxis', 'C': 'Replacement of the central venous line every 7-10 days', 'D': 'Preparation of the skin with chlorhexidine and alcohol', 'E': 'Placement of the central venous line in the femoral vein'},