Work hard so everyone will succeed
I'm gonna have to say A. I'm not sure though. Hope this helps! Have a good day!
Many different groups helped in the building of the Korean Wall.
Villages needed to organize governments. is your best answer
Note that food surpluses means that there is extra food, which means that:
1) the population would increase, not decrease
2) there are more time to create tools, and possessions and other needed things can be kept longer
3) If you hunt and gather more, it would just result in more surpluses.
hope this helps