One of the major difficulties in the biological control of insect/pest is thatA. The method is less effective as compared with the use of insecticidesB. The predator difficulty of introducing the predator to specific areasC. The predator develops a preference to other diets and may itself become a pestD. The predator does not always survive when tranferred to a new environment

One of the major difficulties in the biological control of insect/pest

1.	One of the major difficulties in the biological control of insect/pest is thatA. The method is less effective as compared with the use of insecticidesB. The predator difficulty of introducing the predator to specific areasC. The predator develops a preference to other diets and may itself become a pestD. The predator does not always survive when tranferred to a new environment
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