To replace burned skin, doctors can successfully transplant replacement skin taken from another part of the body of the burn victim. Which statement best explains why the transplanted skin is not rejected? (1) The transplanted skin is damaged, makingthe immune system nonfunctional. (2) The antigens of the replacement skin are the same as those of the damaged skin. (3) Burn victims lose so much blood that white blood cells cannot cause an immune response. (4) There is no blood supply to the skin, so mixing of antigens does not occur.