考前磨刀：这道难度很高的托福阅读事实信息题，你能答对吗？希望对大家的学习有所帮助。
　　Populations cannot grow unless the rural economy can produce enough additional food to feed more people. During the sixteenth century, farmers brought more land into cultivation at the expense of forests and fens (low-lying wetlands). Dutch land reclamation in the Netherlands in the sixteenth and seventeenth centuries provides the most spectacular example of the expansion of farmland: the Dutch reclaimed more than 36,000 acres from 1590 to 1615 alone.
　　According to paragraph 2, one effect of the desire to increase food production was that
　　A. land was cultivated in a different way
　　B. more farmers were needed
　　C. the rural economy was weakened
　　D. forests and wetlands were used for farming