The main purpose of America’s declaration of independence was to explain to foreign nations why the colonies had chosen to separate themselves from Great Britain. It contained the arguments as to why they wanted to separate because it explained their grievances.
I think the answer would be A which would be that it required all citizens to support the slave system.
I believe you are talking about the old kingdom or also known as the ancient world.
The first was walled cities. Another is both offensive and defensive was a fleet of warships. And a third was alliance with other cities.
The answer is B) cultural diversity