Correct Option: C

When a woman becomes pregnant her body undergoes many physiological changes. Her hormone levels change not only to support the pregnancy but also to help redirect nutrients to support the nutritional demands of the developing baby. During pregnancy, a woman’s blood volume increases 35 percent to 40 percent. Red blood cells contain the protein hemoglobin, which requires the mineral iron. Hemoglobin carries the oxygen to the cells throughout the mother and baby, making iron an important nutrient. Because the plasma volume increases by up to 50 percent but the red blood cells mass increases by only 15 percent to 20 percent, the risk of developing iron-deficiency anemia increases during pregnancy. Calcium needs increase during pregnancy to support the growth and development of the baby’s bones and teeth. Failing to consume the recommended 1,200 mg of calcium per day can cause body to pull calcium from the pregnant woman’s bones to use for the baby. This increases the risk of developing osteoporosis, a disease characterized by porous, brittle bones