Q: You are presented with the quiz "What is a possible negative effect of exposing soil to wind " But you don't know the answer, so you turn to your teacher to ask for hints. He says that "being exposed to wind can cause erosion of soil" and "soil erosion causes crop yields to decrease". So, what's the best answer to the question?

Possible answers: A. It used to be covered by water. B. exposure to cold. C. decrease in crop yields. D. greater food production. E. elimination of harmful pests. F. a tree falling. G. wind power increases. H. Damages them.
The answer is:
C.