TOEFL Reading: ETS-TOEFL阅读机经 - XBIH77KX03J5_935L$

Paragraph 6 supports which of the following ideas about recent theories of the development of domestication? A. They are based on the assumption that the causes of domestication are easier to identify in some areas than in others. B. They focus on identifying the single process that was primarily responsible for domestication in any particular region. C. They assume that the causes of domestication varied according to different regions. D. They tend to be poorly supported by archaeological evidence