Answer:
The Treaty of Versailles
Explanation:
In 1919, a little under a year after a ceasefire was ordered, the countries in the war (besides the Central Powers converged to formulate an armistice to "bring everlasting peace", and form the terms of the peace treaty imposed upon the nations of the Central Powers, including the break up of the German Empire, Austro-Hungarian Empire, and acquisition of many Ottoman Empire territories, forming independent nations, and establishing overseas territories for the victorious nations (think British Palestine, Japanese Qingdao, etc). This was all signed on 28 June 1919.
Your answer would be d. a person who starts a cleaning supplies business. Hopes this helps and have a nice day!
Stage 1: Slave ships from Britain to west Africa carrying Cloth, Guns, and drink which are then traded for men, women, and children.
Stage 2: The slaves are traded for said goods and those who did not comply would be shot.
Stage 3: Slaves would be sold to the highest bidder.