1. A 66-year-old wom an com plained to her physician of bleeding gum s. The wom an had been receiving her third cycle of chem otherapy for m etastatic ovarian cancer. A blood analysis showed the...

1. A 66-year-old wom an com plained to her physician of bleeding gum s. The wom an had been receiving her third cycle of chem otherapy for m etastatic ovarian cancer. A blood analysis showed the follow ing results: red blood cell count 3.2 × 106/mm3 (norm al, fem ale 3.5-5.5 × 106/mm3), m ean corpuscular volum e 96 fL (norm al 80-100 fL), hem oglobin 9 g/dL (norm al, fem ale > 12 g/dL), neutrophil count 4600/m m 3 (normal 3000-7000/mm3), platelet count 7000/m m 3 (norm al 130,000-400,000/m m3). A hem atopoietic agent was adm inistered intravenously. W hich of the follow ing drugs would be appropriate for this patient? A. Filgrastim B. Erythropoietin C. Cyanocobalam in D. Leucovorin E. Folic acid F. Oprelvekin