TOEFL Listening: ETS-TOEFL听力机经 - 313Y588DRKN7FZN0P$

What is the main purpose of the lecture? A. To describe different methods anthropologists have used to categorize complex human societies B. To explain how domestication of crops and animals has benefited human societies C. To show how human societies developed complex organizational structures D. To identify problems with a traditional method of classifying human societies