Question ID:PT15 S3 Q18 Passage:In experiments in which certain kinds of bacteria were placed in a generous supply of nutrients, the populations of bacteria grew rapidly, and genetic mutations occurred at random in the populations. These experiments show that all genetic mutation is random. Stem:Which one of the following, if true, enables the conclusion to be properly drawn? Correct Answer Choice:AChoice A:Either all genetic mutations are random or none are random. Choice B:The bacteria tested in the experiments were of extremely common forms. Choice C:If all genetic mutations in bacteria are random, then all genetic mutations in every other life form are random also. Choice D:The kind of environment in which genetic mutation takes place has no effect on the way genetic mutation occurs. Choice E:The nutrients used were the same as those that nourish the bacteria in nature.