请教一道题（狒狒test-7 124)

prayer

the answer is c.
as the passage suggests, the author thinks there must be considerations of safety in the choose of dumping places. So the answer should give another reason instead of that.
A, B, D and E are all concerned about safety, and only c tell us that the shopping of places is out of a concern of cost .so C is the right answer.

prayer

文章说的处理waste的安全性，在哪里倒垃圾的问题。
A:Evacuation plants in the event of an accident 说的事故的安全性；
B：还是事故
D:chemical waste无关
E:跟在哪里倒垃圾无关