A 53-year-old woman with a history of chronic alcohol abuse but without visible jaundice comes to ...

A 53-year-old woman with a history of chronic alcohol abuse but without visible jaundice comes to the clinic complaining of nausea and weakness.
 
  She admits to taking acetaminophen for persistent headaches but denies exceeding the recommended daily dose; she has not taken any other medications. She is suspected of having acetaminophen toxicity. Which of the following diagnostic test findings would implicate a different cause of her symptoms?
  A)
  Normal serum acetaminophen level
  B)
  Elevated serum HBsAg level
  C)
  Evidence of steatosis on liver biopsy tissue sample
  D)
  Hypoglycemia