<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 45-year-old male presents to the emergency room complaining of severe nausea and vomiting. He returned from a business trip to Nigeria five days ago. Since then, he has developed progressively worsening fevers, headache, nausea, and vomiting. He has lost his appetite and cannot hold down food or water. He did not receive any vaccinations before traveling. His medical history is notable for alcohol abuse and peptic ulcer disease for which he takes omeprazole regularly. His temperature is 103.0F 39.4C, blood pressure is 10070 mmHg, pulse is 128min, and respirations are 22min. Physical examination reveals scleral icterus, hepatomegaly, and tenderness to palpation in the right and left upper quadrants. While in the examination room, he vomits up dark vomitus. The patient is admitted and started on multiple anti-protozoal and anti-bacterial medications. Serology studies are pending; however, the patient dies soon after admission. The virus that likely gave rise to this patients condition is part of which of the following families?? A: Flavivirus, B: Togavirus, C: Calicivirus, D: Bunyavirus, E: Hepevirus,  <response>: Based on the description, the patient likely has a viral hemorrhagic fever given his recent travel to Nigeria, high fever, nausea, vomiting, jaundice, and bloody emesis. The main families of viruses that can cause viral hemorrhagic fevers include Flaviviridae, Arenaviridae, Bunyaviridae, Filoviridae, and Paramyxoviridae. Since the question asks about a virus family, we can narrow down the choices to Flavivirus, Bunyavirus, or Togavirus an arbovirus as potential answers. Flaviviruses such as yellow fever virus are endemic to Africa and can cause symptoms similar to those described. Therefore, Flavivirus seems the most likely answer.A: Flavivirus 