Answer:
a. heart disease
Step-by-step explanation:
Many people believe that anemia is a minor disease. But they should not. It can weaken a person and cause serious heart problems if not treated properly. All for lack of iron, vitamins or folic acid. Besides, she never comes alone: there is always a cause for the disease to happen. Cancer is one of the diseases that causes anemia, for example.
Anemia is having a drop in hemoglobin, a blood cell that carries oxygen. Without them, there is no adequate oxygenation of body tissues and problems arise.