A hematopoietic stem cell is defined as

A. a cell with extensive self-renewal and proliferative potential
B. a cell only to produce daughter cells with identical characteristics
C. a cell with the capacity to differentiate into the progenitors of all the blood cell lineages
D. a cell With the capacity to produce some hematopoietic growth factors such as SCF，GM-CSFs，et．a1．
E. a cell with the capacity to express some specific surface antigens such as CD34