Your best choice is "B. the rise of aggressive nationalism among some of the nations defeated in World War I". I hope this helps! :)
Have a great rest of the day.
He made is so we could carry guns and assassinate Kim Jong Un.
1. Indentured servitude of Africans was replaced as slavery that was heavily used in the south for labor in the plantations. British massively has to comply with the demands of more slaves in the turn of the 18th century.
2. Those who are slaves on shops had become an apprentice to the masters which made them develop their skills which are marketable for work.
3. Personal comfort for having household slaves. They were used to prepare food, attend to their master's needs.
They were needed to employ different tasks and to comply for faster work outputs.
Jacob Riis's book How The Other Half Lives, written in 1890, remains an outstanding example of the importance of investigative journalism and the continued vitality of the Fourth Estate. Jacob Riis was among the earliest of what Theodore Roosevelt later termed " muckraker", "taking the rake to uncover the most unpleasant conditions in American society."