There are 8 elements for a group of people to be a religion:
1.) Cities/Towns
2.) Specialization of labor
3.) Education/Art
4.) Form of government
5.) Religion
6.) Writing
7.) Technology
8.) Trade
This was taken directly from my notes. Hope it helped.
Being able to see without the issue of knocking over your oil lamp in the middle of the night. Allowing people to work longer with better lighting.
I think this is the correct answer, but let me know if it is incorrect. People were having more children per family.
Answer: B. were not completely unified
Single member districts and a winner-take-all voting system. Hope this helps!