A graph shows that there were 1 million manufacturing workers in the United States in 1850, then 2 million in 1870, then 5 million in 1900.
Question
Use the graph to answer the question.
Which of the following was the most likely cause of the trend shown on the graph?
(1 point)
Responses
the increase in the number of immigrants to the United States
the increase in the number of immigrants to the United States
the growth of industrialization and the development of factories
the growth of industrialization and the development of factories
the expansion of plantations and the spread of slavery
the expansion of plantations and the spread of slavery
the escalation of nativism in the Northeast