单选题 Which of the following hypothetical scientific discoveries, if made, would weaken the author's arguments concerning the ethical risks of human cloning?

• (A) Through careful and documented study, cloning proves to be less risky than consanguineous breeding.
• (B) A laboratory process for reducing the number of stages in the cell division process is developed.
• (C) A non-cloning method for curing human fertility is discovered, thereby reducing the need to rely upon cloning.
• (D) A procedure for easing the acclimation of a foreign nucleus in the embryonic host is established.
• (E) A means of assessing genetic mistakes in a foreign nucleus before its implementation into a clone is devised.