Fact 1: Aging occurs as cells lose their ability to divide. Fact 2: Cells produce more cells by dividing into two cells. Given the two facts above, what causes less cells to be produced ?

Choose from:
(A). Aging;
(B). loss;
(C). Oxygen;
(D). Nutrition;
(E). drought;
(F). fat;
(G). Sunlight;
(H). coal;
Answer:
(A).