问题详情

What is the purpose in writing this text？
[A] Telling people how serious the damage caused by landslides is.
[ B] Telling people that sending workers to stabilize mountainsides is a risky job.
[ C ] Introducing a product that can be used to stabilize mountainsides.
[ D] Showing people how to use a new product.请帮忙给出正确答案和分析，谢谢！