问题详情

The purpose in writing this text is ______.
A．to tell people how serious the damage caused by landslides is
B．to tell people that sending workers to stabilize mountainsides is a risky job
C．to introduce a product that can be used to stabilize mountain-sides
D．to show people how to use a new product请帮忙给出正确答案和分析，谢谢！