Problem: Mr. Lopez is a 52-year-old male with a history of inflammatory bowel disease (IBD), presenting with fatigue and pallor. Recent labs revealed a hemoglobin level of 9.5 g/dL, MCV of 72 fL, serum ferritin of 15 ng/mL, and transferrin saturation of 10%. Which of the following should be considered? Need Assignment Help? Select all that apply a) Oral iron supplements are the first line due to ease of administration. b) Intravenous iron should be considered due to the presence of IBD. c) Vitamin C supplementation may aid in iron absorption. d) A bone marrow biopsy is necessary to confirm the diagnosis of iron deficiency anemia.