An 18-year-old boy was suspected of having leukemia. It was decided to confirm the diagnosis by performing a bone marrow biopsy. The following statementsconcerning this procedure are correct except which one?
A、The biopsy was taken from the lower end of the tibi
B、Red bone marrow specimens can be obtained from the sternum orthe iliac crests
C、At birth, the marrow of all bones of the body is red and hematopoietic
D、The blood-forming activity of bone marrow in many long bones gradually lessens with age, and the red marrow is gradually replaced by yellow marrow