1. A 15-year-old girl was seen at a clinic because of easy fatigue, irritabilit y, and decreased m ental alertness over the past m onth. The girl was a strict vegetarian and reported heavy m enstrual...

1. A 15-year-old girl was seen at a clinic because of easy fatigue, irritabilit y, and decreased m ental alertness over the past m onth. The girl was a strict vegetarian and reported heavy m enstrual periods since her m enarche. Pertinent lab results on adm ission were red blood cell count 3.1 × 106/mm3 (norm al, fem ale 3.5-5.5 × 106/mm3), hem oglobin 9 g/dL (norm al, fem ale > 12 g/dL), m ean corpuscular volum e 71 fL (norm al 80-100 fL), serum ferritin 5 ng/m L (norm al 30-300 ng/m L). Which of the follow ing drugs would be m ost appropriate for this patient? A. Folic acid B. Erythropoietin C. Iron dextran D. Sargram ostim E. Ferrous sulfate F. Iron sucrose