Given the symptoms Darrel is experiencing—fevers, jaundice, nausea, and abdominal pain—and the context of potential exposure to a bloodborne pathogen, the most likely infection would be Hepatitis B or Hepatitis C.
However, among the options provided, Hepatitis B is often associated with acute symptoms including jaundice and abdominal pain and is a common bloodborne pathogen in such scenarios.
Therefore, the best response is Hepatitis B.