TOEFL Listening: ETS-TOEFL听力机经 - 64Y833KMW11EY99HP$

What does the professor say about how the city of Caral came to an end? A. People moved to the coast to have greater access to the ocean's resources. B. Outside enemy forces invaded the city. C. The city's inhabitants initiated a rebellion. D. The city's inhabitants abandoned the city in an organized manner.