C seems to be the right answer. When historians talk about periodization, they are talking about certain events that happened chronological
B.
The historian is looking to study the effects of interaction of a culture with another one.
The North favored the admission of California to the union. The Compromise of 1850 admitted California as a free territory but also allowed for the Fugitive Slave, which allowed for the recapture of fugitive slaves anywhere in the United States.
Some examples are Karl Marx, Adam Smith , and Frederick Engels. They wrote about the economic severity that industrialization caused and they also caused the emergence of their own economic theories such as capitalism and communism.
