"But the doctor can't use just anyone's blood. The donor's blood has to be of a type that won't be destroyed by your blood." This statement means that______.
A．the doctor can't use the donor's blood because your blood can destroy this
B．the doctor has to choose a donor whose blood can not be destroyed by your blood
C．the doctor has to choose a certain type of blood from a donor whose blood will not be destroyed by yours
D．the doctor can choose a certain type of blood from any donors