Which of these is a possible risk associated with stem cell therapy?
a) the host’s body could reject the transplanted stem cells.
b) stem cells are totipotent and can form other cells or tissue types.
c) stem cells are multipotent and can form only a few other cell types.
d) stem cells could continue to differentiate after they are transplanted.

The correct answer is option  A)The host’s body could reject the transplanted stem cells.

Although the stem cells which are used to regenerate a particular organ are isolated from the bone marrow or adipose tissue of the patient itself, it still has the chances of rejection by the patient's body. This is known as graft rejection. Graft rejection occurs because the host's immune system considers the transplanted organ as foreign tissue and therefore, causes internal bleeding and tissue lysis. In such cases, immunosuppressants like glucocorticoids and corticosteroids are given to suppress the immune response. But, these drugs can cause many side effects to the host's body.

rain is the best answer

"a.) well–developed vascular system."