question: Q:A 42-year-old woman comes to the physician because of increasing fatigue and difficulty concentrating at work for the last 2 months. She has hypertension and a 22-year history of Crohn disease. She has been hospitalized and treated for acute exacerbations, sometimes involving strictures, multiple times in the past. She has not had significant gastrointestinal symptoms in over a year. Current medications include mesalamine, thiazide, and bisoprolol. Her temperature is 37.2°C (99°F), pulse is 72/min, and blood pressure is 140/90 mm Hg. Examination shows a soft abdomen and pale conjunctivae. Rectal examination is unremarkable. Laboratory studies show:
  Hemoglobin 9.4 g/dL
  Mean corpuscular volume 112 fL
  Mean corpuscular hemoglobin 37.2 pg/cell
  Leukocyte count 8,700 /mm3
  Platelet count 150,000 /mm3
  Erythrocyte sedimentation rate 42 mm/h
  Serum
  Ferritin 88 ng/mL
  Iron 117 μg/dL
  Thyroid-stimulating hormone 3.2 μU/mL
  Thyroxine 7 μg/dL
  Further evaluation of this patient is most likely to reveal which of the following findings?"? 
  {'A': 'Tarry stools', 'B': 'Impaired vision in her right eye', 'C': 'Unexplained weight gain', 'D': 'Dark-colored urine', 'E': 'Decreased vibratory sensation'},