One of the major difficulties in the biological control of insect pests is that:

A. The predator develops a preference to other diets and may itself become a pestCorrect Answer

B. They do not always survive when transferred to a new environment

C. The method is less effective as compared to the use of insecticides

D. The practical difficulty in introducing the predator to specific area

Correct Option: A. The predator develops a preference to other diets and may itself become a pest

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