The best answer is C. Tailings are dangerous because they can release toxic elements into the groundwater or surface water. Tailings are the waste materials after the process of extracting the valuable part in a mine. These waste materials have a big potential to destroy the environment because they can release toxic substances which include arsenic and mercury. These tailings can contaminate water bodies.
The best answer choice would be, "C". If you are possessing bad imaginations for yourself, it is most likely you can counter it with GOOD ones.
I hope this helped!
I can’t honestly see the picture
D - the earth is dynamic and constantly changing
