TOEFL Listening: ETS-TOEFL听力机经 - T2943AHX33VX3LW9P$

According to the professor, what did Darwin believe might be true of the finch species on the Galápagos Islands? A. They are closely related to parrots. B. They have been living on the Galápagos Islands for millions of years. C. They all evolved from a single species from South America. D. The size of their populations fluctuates considerably from year to year.