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

question 9

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.