In 1996, a group of scientists in Edinburgh, Scotland announced they had successfully cloned the first mammal—a sheep by the name of Dolly. Dolly was genetically identical to the sheep from which DNA had been taken for the cloning procedure. Four clones made using Dolly's DNA. Genetically, they are identical to Dolly. Although cloning was a scientific breakthrough that held the potential for many beneficial applications, such as cloning organs for transplants or saving endangered species, it became apparent that the technology was not perfect. Dolly only lived six years before she had to be euthanized from complications of advanced lung disease and arthritis. What does the story of Dolly suggest about cloning? I. Cloning may have useful medical and agricultural applications in the future. II. The process of cloning is ready to be used with humans. III. Current cloning procedures may result in organisms with genetic disorders or other health problems. IV. Cloning has the potential to be a controversial technology. A. I and II only B. III and IV only C. II only D. I, III, and IV only