With so many potential problems perhaps cloning research should be banned. "But this is not a technique developed for reproductive purposes, "argues Robert G. Mckinnell, professor of genetics and cell biology at the University of Minnesota. "It is a tool for achieving a new ___32___ of biology at the most fundamental level. "Adds Beatrice Mintz, “Our objective is not to clone a human being, but to cure human disease.”

32.  A. identification       B. reasoning     

       C. understanding     D. acceptance