All but one of the following statements are true: A. Impaired DNA synthesis arrests cell division, blocking the full maturation of red blood cells. B. Megaloblastic anemia occurs with either a folate or a B12 deficiency, disrupting DNA synthesis. C. Megaloblastic anemia is characterized by abnormally large immature red blood cells with no nuclei. D. Symptoms of megaloblastic anemia include fatigue, pale skin, and muscle weakness.