The KoL was an organization founded by Uriah Stephens in 1869. It accepted skilled and unskilled workers, women, and people of any race, unlike many other labor unions. They fought for eight-hour workdays and equal pay for women.
The AFL was a labor union that only allowed skilled workers to enter, so no women or people of other races. It was founded by Samuel Gompers in 1881, and it focused on getting better working conditions for the working class. They used collective bargaining to gain higher wages and shorter workdays.
Unity was brought mainly by the decades-long process of setting up and expanding the European Union in the aftermath of WW 2; also the disappearance of the Iron Curtain in 1989 was a major factor in uniting Europe.
Major disruptive factors were of course the two World Wars, and before 1989, the existence of a Communist-dominated Eastern Europe versus Western Europe.
The answer is (C) Colossus of Rhodes
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Answer:
If a child of a Russian noble didn't learn mathematics, that child was not allowed to marry. The Great Sovereign at that time, Peter I, decreed in 1699 that the New Year's celebration switch to January 1 from September 1. He also decreed that children between 10 and 15 had to learn mathematics in order to get married. This didn't apply to children of freeholders and government clerks. After children mastered math, they were given marriage certificates written in their own handwriting. If they didn't master the subject, they weren't allowed to be given these certificates, and thus, couldn't marry.