I believe it would be listing general ideas
The correct answer in my opinion would be that D is the most important factor here. But this question is quite tricky.
We can surely say for example that literature, organized schools and a hierarchy of priests are not something that constitute a civilization. Organized schools appeared to late, not every civilization had literature and having only a hierachy of priests is not enough to say you have a civilizaton.
Labor has been divided in pre-civilization hunter-gatherer societies as well.
For that reason I'd say the correct answer is D - more food than is needed for survival. Having this, the people in a certain group can focus on other things.
Answer:
Like the rim if a hat or something the president can make a law
Answer:
The cotton gin didnt make Eli Whitney rich because of slavery.
Mayan stoneworkers would decorate their building as a show of rank. It would show the other Mayans that they were important and demand respect.
