What is hematopoiesis?

I - It takes place in the red bone marrow of flat bones and the diaphysis of long bones.
II - In the fetus, erythrocytes are produced in the liver and spleen.
III - With age, the production of the bone marrow of long bones ceases.
IV - All blood cells come from a single hematopoietic pluripotent precursor cell.
V - These precursor cells proliferate and differentiate depending on the presence of growth and differentiation factors (colony-stimulating factors - CSF).
a) I, II, III, IV and V are correct.
b) I, II, III and IV are correct.
c) II, III, IV and V are correct.
d) I, III, IV and V are correct.
e) I, II and IV are correct.