What do genetic studies suggest about the theory that "cultivation and animal domestication were invented in one or two locations on Earth and then diffused from those centers of innovation"? A. The theory underestimates the speed at which cultivation and animal domestication were diffused. B. The theory underestimates the number of locations in which cultivation and animal domestication arose independently. C. The theory overemphasizes the importance of selective breeding in cultivation and animal domestication. D. The theory overemphasizes the importance of cultivation and animal domestication to some groups of people.