Which of the following is not true of the North American Southwest? a. It was mainly made up of farming cultures, which were slower to arise in the American Southwest. B. The North American Southwest included the areas of present-day New Mexico, Colorado, Arizona, and Utah. C. They built large-scale irrigation systems and elaborate, multi-storied structures. D. The Natives of the North American Southwest produced an abundance of basalt sculpture. Please select the best answer from the choices provided A B C D.