Answer:
In the case Plessy v. Ferguson, the Supreme Court determined that segregation was allowed as long as the facilities were "separate but equal." This was overruled with Brown v. Board of Education
With Brown, African-Americans were given civil equality but were still treated as second class citizens and were thus not socially equal. So, social equality is how people actually treat each other while political equality is how they are treated by the law.
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... This assassination led to Austria-Hungary declaring war on Serbia.
If one of the answers is machines then that is the answer
