A 39-year-old woman presents with dyspnea, fatigue, pallor, tachy- cardia, anosmia, and diarrhea. Laboratory results are: hematocrit 32\% (normal 36.1-44.3\%), MCV 102 femtoliters (fL) [(normal 78-98 fL)], 0.3 \% reticulocytes (normal 0.5-2.0\%), 95 pg/mL vitamin B12 (normal 200-900 pg/mL), and an abnormal stage I of the Schilling test, indicative of a deficiency in intrinsic factor. Autoantibodies are detected to a cell type that is found in a region shown in the accompanying diagram. In which region would those cells be found?
Select one:
a. E
b. C
c. D
d. A
e. B
f. F
g. G