问题详情

According to the passage, why did the government pass the Timber Culture Act of 1873 ？
A．To make larger tracts of land available to small farmers
B．To settle Kansas, Nebraska, and the Dakotas
C．To encourage land speculation west of the Mississippi
D．To increase the variety of trees growing in the western states请帮忙给出正确答案和分析，谢谢！