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During the late nineteenth century, changes in Siam's power structure had important economic consequences. A. Population movement occurred and rice cultivation intensified because Siam became more actively involved in international trade. B. Changes in taxation and the ending of the requirement that people work part-time for the rulers allowed farmers to produce more rice for the marketplace. C. Population increases occurred in part because Siam's farmers were able to produce more rice to feed the population. D. Land became so valuable that villagers had to pay the government for the land that they worked on. E. Although rural living standards may have improved somewhat, prosperity varied from village to village and government bureaucracy played a greater role in village life. F. Government modernization in the early twentieth century resulted in the loss of some freedoms that the rural population had gained from the traditional ruling classes.