A 46-Year-Old Caucasian Male Presented to the Hospital in Fulminant

A 46-year-old Caucasian male presented to the hospital in fulminant liver failure secondary to prolonged alcohol abuse. He received a liver transplantation two days ago from an unrelated donor. His post-operative course has been uncomplicated thus far.
-The patient discusses his antirejection medication regiment with the nurse.He asks how they work to prevent graft rejection.What is the best explanation by the RN?  

A) Antirejection medications work on your liver to make it less hostile to its new environment,increasing the chances of organ acceptance.
B) Antirejection medications work by changing the MHC markers on your new liver to be more like your own.
C) Antirejection medications work by suppressing the body's immune response against foreign MHC markers.
D) Antirejection medications work by causing your body to think its MHC markers are similar to your new liver's.