A purebred pet results from which of the following types of mating? O two of the same breed bred through designer breeding, mating members of two separate breeds until their offspring begin to look alike
O two separate breeds bred through selective breeding, mating only individuals who look very much alike
O two of the same breed bred through artificial selection, mating only members of the same breed for many generations
O two separate breeds bred through artificial selection, mating only individuals known to be free from disease