Shortages of Iron in Our Diet Can Cause Iron Deficiency

Shortages of iron in our diet can cause iron deficiency anemia, a condition that reduces the amount of hemoglobin in red blood cells. Iron deficiency anemia is a potentially serious condition that is characterized primarily by

A) a change in the color of blood from its normal red to various shades of blue and purple.
B) a reduction in the blood's capacity to transport oxygen.
C) a delay in the time required for the blood to clot and a potential for extensive blood loss in the event of trauma.
D) a reduction in the concentration of white blood cells and an increased vulnerability to infection.