A Scientist Observes a Population of Grasshoppers in a Farmer's

A scientist observes a population of grasshoppers in a farmer's field several times over the summer.She notices that after each application of an insecticide the grasshopper population increases to its pre-pesticide levels very rapidly and that the population never goes near zero at any time.The scientist's results indicate the grasshopper population is probably

A) in the lag phase.
B) in the exponential growth phase.
C) in the deceleration phase.
D) in the stable equilibrium phase.
E) at carrying capacity.