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
Answer: The 3rd Amendment
Explanation: The third amendment states this: "No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law."
Answer:
<u>C. Pacific Ocean.</u>
Explanation: If you look at a map you will see that the Pacific Ocean lies on the eastern border of China. Hope this helps ^-^.
Can you be a bit more specific? I might be able to help you if you be a little more specific.
