The Magna Carta was first in 1251. Columbus discovered america in 1492.
Answer:
I would go with B, "populations declined in urban areas"
Explanation:
For all 3, the urban population is much greater in 100 CE than 1000 CE. I find the graphs to be set up in a poor way and you'd expect them to have grown, so forgive me if I'm wrong.
It was in the southern part of Mesopotamia and it later became Babylonia which is now southern Iraq