Answer:
30 months
During this siege, the duration of which was either 18 or 30 months (see below at "Chronological notes"), the Bible describes the city as enduring horrible deprivation (2 Kings 25:3; Lamentations 4:4, 5, 9).
Explanation:
That would be a direct democracy. All adult male citizens attending the assembly could vote on the issues proposed at the time.
Douglass portrays the slave traders and agents for slave traders as men auctioning for cattle instead of human beings. The slave traders and agents for slave traders at no point stop to think what they are doing is wrong, instead, it is business as usual and they are eager to acquire misbehaved slaves at steep discounts, much the same as farmers will bid pennies on the dollar for underweight farm animals.
An oligarchy- by definition- means, “A small group of people having control of a country, group, or organization.” (Source for definition: “Google”)
The answers not supported by this definition are: B, C, and D, as B and C are citizen-contributed systems, and D is a monarchy/dictatorship.
This leaves us with answer “A” being the only plausible answer to fit our description.
I hope this helps!