The ideology of nationalism became very powerful in the Balkan peninsula wherein the people of the region believed that they had to isolate themselves from the presence of foreigners. Due to this attitude, there was tension that brewed between the Balkan region and the other countries. This eventually became one of the reasons for WWI.
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The correct answer should be African-Americans
They were segregated and had hard times finding jobs and when they did manage to get them, it was mostly low-skilled low-paying physical jobs like carrying bags of cement or loading ships in the docks. When the great depression came, they lost even this because white workers were prepared to do even those jobs so they lost even the little wage that they had.
Answer: Columbus thought he had discovered India.
Explanation:
This was actually a surprising factor because after discovering America, it turned out that Columbus all along thought he had discovered India. That is why the native population was called Indians. After the first expedition, Columbus visited America twice more. The original expedition sailed to the Bahamas, and the next two led by Columbus ended up in Cuba and Haiti.