单选题One factor causing death on organ transplantation is ______.A heavy bleeding during surgeryB destruction of patients’ immune systemC objection from patients to taking organs of othersD doctors’ lack of confidence
题目
单选题
One factor causing death on organ transplantation is ______.
A
heavy bleeding during surgery
B
destruction of patients’ immune system
C
objection from patients to taking organs of others
D
doctors’ lack of confidence