The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
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Because in the south there was more segregation. Also there was more land that had been untouched in the north. The property was also cheaper because of that reason. And since it was untouched a lot of businesses came in to drill for oil and other natural resources, which created the need for workers.
It is true I did that one
"The OPEC oil embargo" was the reason of the oil crisis during the 1970s among the choices given in the question. The correct option among all the options that are given in the question is the third option or option "C". I hope the answer has actually come to your desired help.
Answer:coastal plains
Explanation:I had that question
