A 12-year-old girl presents for her annual well child check. She had menarche eight months prior, and has had menses every month. Each cycle lasts two weeks. The patient uses at least six pads on most days of the cycle. On exam, she is pale but otherwise well appearing. Her heart rate is 80 beats per minute, blood pressure 110/65, and respiratory rate 14. The remainder of her exam is within normal limits. Which of the following are the most likely laboratory findings? AHemoglobin 12 g/dL, mean corpuscular volume 80, RDW 10 BHemoglobin 6 g/dL, mean corpuscular volume 60, RDW 12 CHemoglobin 6 g/dL, mean corpuscular volume 60, RDW 18 DHemoglobin 8 g/dL, mean corpuscular volume 100, RDW 10