The graph shows regional and global trends in wheat farming since 1961. In this graph, the amount of wheat is measured in pounds per acre of farmland.

A. Using data on the graph, compare the wheat production trend lines of East Asia and Africa from 1961 to 1971.

B. Explain how pesticides and irrigation pumps had an effect on wheat farms in East Asia.

C. Explain how the Green Revolution had impacted farming around the world.

D. Using ONE region on the graph, explain how the changes in wheat impacted migration between farms and cities.