question: Q:A previously healthy 67-year-old man comes to the physician because of a history of recurrent right lower abdominal pain for the past 2 years. A CT scan shows a 1.2-cm (0.47-in) mass located in the terminal ileum. He undergoes surgical removal of the mass. A photomicrograph of the resected specimen is shown. Cells from this tissue are most likely to stain positive for which of the following?? 
  {'A': 'Desmin', 'B': 'Chromogranin A', 'C': 'Vimentin', 'D': 'Cytokeratin', 'E': 'Glial fibrillary acid protein'},