TOEFL Listening: TPO-TOEFL阅读TPO - U1M3P5428J359D43N$

It can be inferred from the passage that the author most likely believes which of the following about the future of desertification? A. Governments will act quickly to control further desertification. B. The factors influencing desertification occur in cycles and will change in the future. C. Desertification will continue to increase. D. Desertification will soon occur in all areas of the world.