大全906迷糊了。。。

termaze

Unlike transplants between identical twins, whose genetic endowment is the same, all patients receiving hearts or other organs must take antirejection drugs for the rest of their lives.

(A) Unlike transplants between identical twins, whose genetic endowment is the same

(B) Besides transplants involving identical twins with the same genetic endowment

(C) Unless the transplant involves identical twins who have the same genetic endowment

(D) Aside from a transplant between identical twins with the same genetic endowment（C）

(E) Other than transplants between identical twins, whose genetic endowment is the same
答案是C。 但除了A我知道是错的，对于，BDE有没有NN给讲解一下啊？