GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 53WKEV52H0U77J55J

If the information provided is true, which of the following is most strongly supported on the basis of it? A. Mature monarch butterflies do not feed on parts of milkweed that contain glycosides. B. The glycosides in milkweed sap are slightly toxic to caterpillars of other species. C. The vast majority of the monarch butterflies that are laying eggs in a given region will have traveled there from a single region. D. There are substances other than glycosides in milkweed sap that accumulate in a monarch caterpillar and are retained in the body of the mature butterfly. E. There are certain glycosides that are found in the sap of all milkweeds, no matter where they grow within the monarch butterfly's range.