It established a permanent method for apportioning a constant 435 seats in the U.S. House of Representatives according to each census.
"The cause of" would be the answer
20. The Answer is true.
21. Habeas corpus
22. B is Atlanta, D is Gettysburg, A is Vicksberg and C is Antietam.
23. Fort Sumter
24. C is thirteenth, B is fourteenth and A is fifteenth.
25. I’m not sure
26. Andrew Johnson
27. Freedmen’s bureau
28. Black codes
29. True
30. Rutherford B Hayes
31. Compromise of 1877
Well, the Sumerians were very hard working and inventive people; most of their inventions are actually used today by almost everyone! (If you didn’t already know) Sumerians invented the first written language, cuneiform, the wheel, the sail boat, the game “Checkers” and much more.
By Sumerians working together they not only created those things, but they also started trading with others which fulfilled them with much needed food, clothing, and raw materials. So by them opening up to trade, they were able to prosper longer.
I hope this helps what you are looking for!
Austin-