IPM (Integrated Pest Management)is Becoming Widespread as a Way to Control

IPM (integrated pest management) is becoming widespread as a way to control pests.This method

A) first uses chemical controls to maximize yields.
B) has been shown not to be effective in commercial agriculture.
C) first uses cultivation such as intercropping, then uses biological controls, then chemical controls in hard hit areas.
D) uses a mixture of several modern pesticides applied at one time.
E) first uses chemical controls, then biological controls and then cultivation.