Which Is the Best Explanation of How Immune Suppression Can

Which is the best explanation of how immune suppression can be helpful in preventing transplant rejection?

A) The immune system sometimes reacts against foreign antigens in the grafted tissue, causing what is often called a rejection syndrome. Immune suppression drugs reduce the immune system's ability to attack the foreign antigens in the donated tissue.
B) Because rejection is caused by an inappropriate and excessive response to self-antigens, giving immune suppression drugs would reduce this effect.
C) Rejection involves antigen-antibody reactions, mainly IgE triggered by repeated exposure to an allergen, so immune suppression drugs would reduce the reaction to the allergen, which in this case is the transplanted organ.
D) Delayed allergic response occurs with transplanted organs, so immune suppressive drugs would reduce the allergic response and decrease rejection.