It should be D. because they blockaded the mississippi river.
The answer is: B, D, and F
Explanation:
Alliances, Security threats, and trading relationships.
False
The children worked from morning to midnight and did not get paid fairly or didn't get paid at all
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.
