Sorry if this is a little late but im almost positive it is C
<span>The secession of several border states</span>
Economists said that they have a chemical plant that they can affect their self control
Answer:
I hope this helps
Explanation:
The factors that caused the growth of cities in America were threefold. First, the Civil War had displaced thousands of soldiers and emancipated Black people, many of whom migrated to the cities in the North. Second, the concentration of industry and banking significantly increased the power of major metropoles. Finally, immigration from Europe inflated the number of urban inhabitants as well. Americans responded to the challenges by initiating the Progressive Movement and advocating for labor laws.
I believe the answer is c if i am wrong i am so sorry
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