Most Organ Transplants Fail Because

Multiple Choice

Most organ transplants fail because

A) of poor vascular connection between host and donor tissue.
B) the migrating leukocytes attack the tissue adjacent to the transplant.
C) cytotoxic T cells enter the transplant through the connecting blood vessels and kill the individual transplant tissue.
D) introduced tissues produce antibodies that cause a massive reaction.
E) of all of these.