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:
brainly.com/question/441267
The correct answer would be A
B. It could be transported easily on Rivers and turnpikes
If this is a true or false question, yes this is true since information of the periods of time in the A.D. era are still not 100% accurate, and there's many questions regarding the actual events leading up to others, and questions about specific resources/items that were able to be recovered FROM those time periods.
In the south during the Civil War you had "Stonewall" Jackson and Robert E. Lee and William T. Anderson. In the North you had Ulysses Grant and Robert Anderson and George Custer and Benjamin Butler.
