D) Increased immigration in industrial areas.
By 1890, production by factories in American had grown eight times larger than what it had been before 1860. A large part of the workforce came from immigrants coming to the United States and settling in cities, looking for jobs. Ireland was one example of a country from which many immigrants came, looking for work in America, after the devastation of famine in Ireland (especially from potato crop failures).
Surprisingly, in many ways. However it mostly depends on which country.
I'll give you an overall answer that all countries had in common.
For the most part, there was food regulations and a lot of "support your military" propaganda.
Food was scarce, and the military needed donations.
This also goes as far as bedding, vehicles, and communication devises.
I hope this helps! :)
India and China claim few slaves with a lion's share of their populace as the low class that did likewise fill in as the slaves. The Indians and Chinese were not noticeable in bondage as the Greco-Romans since they had their kin taking the necessary steps that the slaves did. The Chinese and Indians one might say had slaves it was quite recently that the slave was called something different and held a higher economic wellbeing than simple slaves.