Refer to the Graphs

Refer to the graphs. Based on the graphs, which conclusion can reasonably be drawn about future extinctions?

A) Extinctions are a minor concern; only 1 percent of species have gone extinct, and more than half of all organisms are classified as of "least concern."
B) Future extinctions are highly likely because 20 percent of assessed species are threatened—perhaps more, as data are deficient for another 20 percent.
C) No conclusions can be made, because the graph only covers a small percentage of existing species and data are deficient for many.
D) Only vertebrates are in danger of extinction; very few invertebrates or plants are threatened.
E) Only amphibians have enough threatened species to warrant concern about future extinctions.