TOEFL Listening: ETS-TOEFL听力机经 - LY38919UT5L8W8NYP$

What did the Grants' finding show? A. Dissimilar species in the same environment can evolve in similar ways. B. Evolutionary changes are sometimes reversible. C. The population of Darwin finches was decreasing slightly with each generation. D. Evolutionary changes can be observed in the short term.