Which of the following best describes the organization of the passage? A. A historical account of the various people that have lived in southwestern North America followed by conflicting views about the accuracy of the account B. A comparison and contrast of the historical role of agriculture in different parts of the southwestern region of North America C. An explanation of how the solutions developed to improve living conditions in southwestern North America spread to other neighboring regions D. A description of a long-standing problem faced by the people in southwestern North America followed by a discussion on strategies that have been used to overcome the problem