A client with iron-deficiency anemia asks, "What does this low mean corpuscular volume (MCV) level mean?" Which response by the nurse is most accurate?

A) It indicates the size of your red blood cells, which is lower than normal in iron-deficiency anemia.
B) It suggests that your blood lacks enough iron, which affects the size of your red blood cells.
C) It shows that your red blood cells are smaller than they should be, which is typical in iron-deficiency anemia.
D) It means your blood cells are not functioning properly due to a lack of iron, leading to a decrease in their size.