Cloning has been criticized for all the reasons EXCEPT ______.

A．some authorities don't like Dolly's cloning in many aspects
B．cloning technology has aroused great anxiety among people
C．President Clinton stopped giving money to researchers on human cloning
D．40-nation Council of Europe had passed a ban on human cloning

A．people feel cloned children may not live longer than those naturally born
B．cloning technology is not so advanced that people feel doubts about it
C．it is so expensive that ordinary people have no access to it
D．it is not only costly and inefficient, but unacceptable as well