问题详情

Why does the author mention gunpowder in Paragraph 3？
A．To remind readers that the colonial era ended in warfare．
B．To give an example of a product made from wood consumption．
C．To illustrate some negative aspects of some industrial processes．
D．To suggest that wood was not the only important product of the colonies．请帮忙给出正确答案和分析，谢谢！