The industrial melanism in peppered moth populations that has occurred over the past 100 years provides an example of natural selection A. Over time, peppered moth populations in Germany and England migrated from nonindustrialized areas to those that were industrialized. B. Originally most peppered moths were pale in color, but especially in areas of extreme industrialization, dark-colored moths began to dominate. C. Kettlewell's experiments showed that birds were acting as a selecting force by eating light-colored moths on dark trees in polluted areas. D. The recent increase of pale forms as pollution decreases supports the importance of natural selection by birds as a factor affecting peppered moth populations. E. According to Kettlewell's theory, natural selection produced birds that were better able to detect moths even when areas were polluted. F. Recent research indicates that when adult moths fail to choose appropriate backgrounds, they are usually eaten by birds.