Year What is the most reasonable hypothesis for the increase in insects seen in year four?
A
If insects from a neighboring field had moved into the area before the insecticide was applied in year four, then their population would increase
B
If the insecticide used in year four was stronger than it was in previous years then the population of insects would decrease
If the population of insects was resistant to the insecticide, then their population would increase in year 4.
D. If the insects in the field in year four were the same species as in previous years, then the population would decrease