The correct answer is A. Both the Songhai and Mongol empires poured themselves into their military hierarchy to control the conquered regions.
Answer: B. keep the balance of power in the Senate between the slave states and free states.
Further detail:
The Missouri Compromise (1820) admitted Missouri into the Union as a slave state with Maine being added at the same time to keep the balance of slave and free states equal. It also prohibited any future slave states north of the latitude line 36 1/2 degrees north of the equator in territories of the Louisiana Purchase, with the exception of Missouri (north of that line) being admitted as a slave state.
Assuming you're referring to a political context, the Ancient Greeks practiced a system of "direct democracy," in which each eligible citizen voted directly on all issues facing the state. This is different than a representative democracy, as it exists in the United States.
Answer:
Deaths of millions
Capitalism involves private ownership
Haitian Revolution