Jared Received a Donor Kidney

Multiple Choice

Jared received a donor kidney. After the first week, it became apparent that Jared's body was rejecting the organ. This is due to

A) a lack of a match between Jared's immune cells and the MHC class I molecules on the cells of the donor kidney.
B) Jared's lack of helper T cells that prevent the lymphatic tissue of the donated kidney damaging the donated kidney.
C) an autoimmune disease that is destroying healthy tissue.