Answer:
A. enable us to form tentative hypotheses about what students know and can do.
The 25 000 is a good tip: what happened then?
It was the time of the last Glacial Maximum (Ice age). So either the Bering Strait was frozen over at the time, or the sea water was lower because so much water was taken up by the glaciers (or, most likely, a combination of the two).
For the people (and we shouldn't be thinking "them", but "us" - we all hope to be older one day!)
this means a better quality of life when old, and also potential longer life and longer health: with more social stimuli, the brains will be longer healthier
For the society:
lower costs of care (since the elder will be longer independent) and the possibility of benefiting from their experience!
It was art. The Neolithic Age was known was the New Stone Age. It was a way of advancing the innovating the culture.
