The reasons for investigating stem cells to replace damaged organs and tissues in a patient include all of the following EXCEPT

A)the patient will not reject tissues produced with their stem cells.
B)adult stem cells can be successfully induced to develop into some specifically needed cell types.
C)embryonic stem cells can be coaxed into developing into any cell type in the body.
D)umbilical cord blood cells are less likely to cause GVHD than adult stem cell grafts.
E)pluripotent stem cells naturally occur even late in life in mammals.