Which statement would MOST LIKELY be claimed by the author of this passage? A) That man-made trade barriers are the biggest challenge facing Africa's international trade success. B) That agricultural, industrial, and service sector reforms must be made for Africa to trade internationally. C) The solution to Africa's international trade problems must be dictated by the United Nations and the World Trade Organization. D) Environmental factors such as drought and desertification are the major challenges facing Africa's international trade development.