Apple farmers are currently having a very difficult time with pesticide-resistant insects. These insects are no longer being killed by the current chemical treatments, thus causing a lot of damage to the apple crops. In reaction to this, researchers are developing newer and stronger chemicals to help control the bugs.

Which of these best explains why the apple farmers seeing these new, stronger bugs?
A) The bugs were not native to the area and thus cannot be killed by normal chemicals.
B) Changes in the weather have led to stronger insects that can survive these harsh changes.
C) The strongest bugs were able to survive pesticides, reproduce and create more resistant pests.
D) The apple trees are producing too many apples, which is allowing the insects to reproduce rapidly.