Question ID:PT46 S3 Q20 Passage:Scientist:  Genetic engineering has aided new developments in many different fields. But because these techniques require the manipulation of the genetic codes of organisms, they are said to be unethical. What the critics fail to realize is that this kind of manipulation has been going on for millennia; virtually every farm animal is the result of selective breeding for desired traits. Since selective breeding is genetic engineering of a crude sort, genetic engineering is not unethical. Stem:Which one of the following is an assumption on which the scientist's argument depends? Correct Answer Choice:CChoice A:The manipulation of the genetic code of organisms is never unethical. Choice B:Anything that is accomplished by nature is not unethical to accomplish with science. Choice C:The manipulation of the genetic code through selective breeding for desired traits is not unethical. Choice D:The manipulation of the genetic code through selective breeding for desired traits is important for human survival. Choice E:Science can accomplish only what is already in some sense natural, and nothing natural is unethical.