GRE Reading Comprehension: Princeton-GRE阅读Princeton - GQ14M644QDQQK4UYC$

The author most probably mentions some species of Lepidoptera in order to A. detail a species that may be more effective at controlling ragweed than are the most aggressive herbicides B. suggest a potential research avenue to the problem of controlling ragweed that is at present poorly explored C. discuss a type of mammal that feeds on ragweed plants and may be successful at controlling the spread of ragweed D. plead with the government to spend more money and put more research efforts into finding a natural control for ragweed E. argue that complete elimination of the ragweed plant will only be possible if the government funds research into natural controls of ragweed