What can be inferred from paragraph 1 about human life in Mesolithic Scandinavia?

• People tended to live in smaller groups during the Ertebolle Period than during earlier Mesolithic periods
• The areas where it was advantageous to live changed over time as a result of environmental changes
• Human groups were less affected by environmental change during the Maglemose Period than during the Kongemose Period
• During most of the Mesolithic, people were more dependent on terrestrial food sources than other food sources

This is a multiple choice.