Why Do Red Blood Cells Derive All of Their Adenosine

Why do red blood cells derive all of their adenosine triphosphate (ATP) from glycolysis of glucose?

A) Electron transport chain and Krebs cycle do not produce sufficient ATP for red blood cells to transport oxygen.
B) Electron transport chain and Krebs cycle are active only during the absorptive state of metabolism.
C) Electron transport chain and Krebs cycle take place in the mitochondria, which is absent in red blood cells.
D) Glycolysis takes place within the lysosomes of the red blood cells.
E) Glycolysis takes place within the nucleus of the red blood cells.