Which is most likely to result after a farmer sprays his crops with pesticides

The bugs in the soil or on the plants will die

Explanation:

The bugs and some of the plant will be infected some will die some will stay alive it all depends on how strong the pesticide is and consummation of the crop will sometimes result in a dangerous turn of event to your stomach if not washed properly.  

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.