TOEFL Reading: ETS-TOEFL阅读机经 - A34Y1E_4Y5ZJV4G1L$

Why does the author present an extended discussion of Lewis Binford's formulation of a typical "hunter/collector food-gathering strategy?" A. To introduce recent evidence from Inner Eurasia that has changed the archaeological understanding of the daily lives of human hunters B. To support the claim that setting Inner Eurasia must have required new social structures C. To challenge the claim from the previous paragraph that hunting is a difficult, dangerous, and unreliable way of life D. To present a theory about the life of humans in Inner Eurasia that will be contradicted later in the passage