You may have learned about the sheep clone, Dolly, in your science class. Although this experiment was greeted as a great success, there are many problems with cloning. One of the ethical issues surrounding cloning has to do with the success rate of the process. This is because

A) cloning has never been and never will be possible.
B) cloning has become too successful in recent years.
C) cloning mammals has a very low success rate, and can produce severely damaged young.
D) cloning mammals has a very high success rate, and can produce severely damaged young.