Amelia is a general physician. One of her patients claimed to be suffering from constant stomach ...

Amelia is a general physician. One of her patients claimed to be suffering from constant stomach aches. After running some tests, Amelia concludes that the patient is not suffering from any medical disorder. However, the patient insisted that she has stomach cancer. The patient was then made to participate in an experiment where she was given sugar pills and was told that it was a new medicine for treating cancer. Some other participants in the experiment were also given sugar pills. This best exemplifies _____.
 
  A) a volunteer bias
  B) a placebo
  C) a nocebo
  D) debriefing