The 14th Amendment<span> to the Constitution was ratified on July 9, 1868, and granted citizenship to “all persons born or naturalized in the United States,” which included former slaves recently freed.</span>
C I think. Was there a passage to read?
The correct answer is a. evolution.
Darwin was the scientist behind the theory of natural selection, one of the main mechanisms behind evolution (next to sexual selection).
In The Communist Manifesto, Karl Marx hypothesized that capitalism would fail if workers revolted and took over the economic system. They would then change this to socialism, and then it would become communism. This was due to excessive tensions between socio-economic classes and with the working class ultimately taking over, as Marx did not believe capitalism would be able to work within the bounds of society.
The eighteenth-century Enlightenment philosophers believed that society could best achieve progress through "rational thought and pragmatism", since these thinkers called into question the blind faith many people had in monarchy and God.