The Congress of Vienna brought together the European Great Powers together immediately following Napoleon and France's defeat in 1914. The goal of the Congress was to restore order to the European Continent. The leaders of Britain, France, Russia, and Austria sought to do this through re-establishing the balance of power in Europe to prevent future conflict. Through this "congress" which was in fact a series of informal conversations between the countries leaders led to the establishment of numerous treaties between the Great Powers. As parts of these treaties there were also large territorial redistributions of land amongst the great powers.
The industrial revolution did.
In the beginning, the only perceived difference was that they were not Christians so they wanted to baptize them. After the industrial revolution, the European countries developed rapidly while African and Asian countries didn't and Europeans believed that this was due to their superior race so they decided to colonize them under the pretense that they would help them develop.
A. Members of political parties who expected to earn government jobs from their party's elected office holders.
It is true, at least from what I've learned.
The answer is A. Pathways to Preosperity.