Caterpillars of all species produce an identical hormone called "juvenil hormone" that maintains feeding behaviour. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding.

Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural peswts that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?

B. Many agricultural pests do not go through a caterpillar stage.

C. Many agriculturally beneficial insects go through a caterpillar stage.(key)

请教NN，此题该怎样做问题分析？为什么我觉得B C都是在取非？