Immigration to the north provided workers for production and replacements for soldiers killed or wounded.
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!
An example of a Liberal Political Organization would be one that seeks to provide for the protection of the disenfranchised, the poor, the orphaned and so on. Most humanitarian organizations are considered as being "Liberal" due to the fact that they don't necessarily use the common model of business to operate. These organizations rely on donations and tax grants to do their work.
The Red Cross, UNICEF, Save the Children, and so on
