Answer: B. Joseph Brant
Explanation: Mohawk war chief
Joseph Brant led a number of brutal attacks in southwestern New York and northern Pennsylvania. Farther west, Henry Hamilton,
British commander at Detroit, paid Native Americans for settlers' scalps. This practice earned him the nickname, the "hair buyer." Sorry if it's wrong, and have a nice day, and hope this helps.
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!