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 now largely ineffective against many insects. Which of the following possible actions would have had the best chance of preventing this evolution of DDT resistance?

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) The use of DDT should have been interspersed with the use of other pesticides that have a different mode of action.
D) DDT application should have been continual.