DDT Was Once Considered a "Silver Bullet" That Would Permanently

Multiple Choice

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?

A) All habitats should have received applications of DDT at about the same time.
B) The frequency of DDT application should have been higher.
C) None of the insect pests would have genetic variations that resulted in DDT resistance.
D) DDT application should have been continual.