From 1980 and 1990 the insects were sprayed with an insecticide that caused the population to decrease. From 1990 to 2000 the insects were sprayed with the same insecticide, but the population increased. What most likely caused the population to increase? A) The insects were affected by the insecticide causing the population to increase.

B) Due to genetic variation, the insect population adapted to the insecticide.

C)The concentration of insecticide was too great, and therefore biodiversity was reduced.