TOEFL Reading: ETS-TOEFL阅读机经 - B7Y6433ABAYKJ88JL$

What can be infer from paragraph 1 about human life in Mesolithic Scandinavia? A. People tend to live in smaller group during the Ertebolle Period than during earlier Mesolithic Period. B. The areas where it was advantages to live changed over time as a result of environmental changes. C. Human groups were less affected by environmental change during the Maglemose Period than during the Kongemose Period. D. During most of the Mesolithic, people were more dependent on terrestrial food sources than other food sources.