It can be inferred from the passage that which of the following would most alleviate the "side effect"? A. The use of greater variety of common nonspecific insecticides to control crop-destroying insects B. Increased knowledge about the predator/prey relationships among insects C. The replacement of common nonspecific insecticides with specific insecticides that eliminate only crop-destroying insects D. The use of specific insecticides that eliminate only crop-destroying insects in alternation with the use of common nonspecific insecticides E. A carefully controlled reduction in the population of predator insects