A. Carrots are rich in beta-carotene (vitamin A), which is important for vision and skin health, but they are not a significant source of iron, which is needed to address low hemoglobin levels. B. Raisins are a good source of iron, which can help increase hemoglobin levels in clients with iron-deficiency anemia. Iron is essential for hemoglobin synthesis and improving oxygen-carrying capacity of the blood. C. Maple syrup is primarily a source of sugar and calories, with negligible iron content. It does not contribute to improving hemoglobin levels. D. Orange juice is rich in vitamin C, which enhances iron absorption from plant sources, but it does not provide iron itself. While it can complement iron-rich foods, it is not sufficient on its own to raise hemoglobin.