Answer: I'm pretty sure the answer is B
I'm pretty sure it is either C or D.
Cuneiform language no one else could understand... need any more help let me know
Answer:
The Bering Land Bridge formed during the glacial periods of the last 2.5 million years. Every time an ice age began, a large proportion of the world's water got locked up in massive continental ice sheet
Explanation:
It means they had highly advanced infrastructure for their time. It's worth noting that major cities like New York use very similar grid like patterns for their layout still today, in 2016.