Among the immigrants, the largest occupation group are the Laborers. During the 1800's, a lot of factories and mines were in operation. Immigrants did not have the set of skills and knowledge to enter into certain jobs. Laborer jobs did not require much skill and knowledge and so it was easy for immigrants to get the job.
C and d have to do with the upper classes and how they (mostly) utilized labor. Populists were more concerned with how to make things work for them (a bit cynical on my part).
The progressives (particularly women and labor leaders) were very concerned about working conditions and how to improve them.
B<<<< answer
Answer:
Aztecs sacrificed people.
C. Rome was located on the western coast of the Italian peninsula.
The correct answer is B) The upheaval caused by urban industrial laborers.
During the time of the American Revolution, the increase of industrialization had not taken place in the North American continent. America does not begin large scale industrialization until the middle of the 19th century.
All of the other answer choices played a critical role in starting the American Revolution. The debt from the Seven Years War resulted in the need for the British government to tax the colonists.
The thousands of miles between Britain and North America caused a disconnect and the development of two very different cultures.
Lastly, the British neglect of the needs/desires of the American colonies caused resentment. This is due to the fact that the American colonists were not represented in the British parliament (who passed a series of taxes on the colonists).