question: Q:A 36-year-old man with a history of a stab wound to the right upper thigh one year previously presents to the emergency department with complaints of difficulty breathing while lying flat. Physical examination reveals an S3 gallop, hepatomegaly, warm skin and a continuous bruit over the right upper thigh. Which of the following is most likely responsible for his symptoms?? 
  {'A': 'Decreased sympathetic output', 'B': 'Increased peripheral resistance', 'C': 'Increased venous return', 'D': 'Decreased contractility', 'E': 'Increased pulmonary resistance'},