A significant difference between the North and the South in the years leading up to the Civil War is described by A. The North favored a protectionist tariff on foreign goods, while the South did not. I hope that this is the answer that you were looking for and it has helped you.
        
                    
             
        
        
        
Answer:The answer is A 
Explanation:Because Lincoln gave all the slavery there freedom and citizenship back all because of the Emancipation Proclamation.
 
        
             
        
        
        
Brown v. Board of Education of Topeka was a landmark 1954 Supreme Court case in which the justices ruled unanimously that racial segregation of children in public schools was unconstitutional.
        
             
        
        
        
Answer:
The Qing Dynasty, is the dynasty that the Chinese people still admire today.
Explanation:
Hope this helps :)
 
        
             
        
        
        
Part A: Working hours changed from around 14 hours a day before the 1880's to being reduced slowly down to 12, then 10, eventually moving to an 8 hour day. This change allowed for workers to to have more time to sleep and for leisure. Another change was the end of child labor. Similar to the decrease in hours, the minimum age increased over time as well moving from 10 to 16. 
Part B: One strategy used by unions to achieve these goals were strikes. Workers would leave the job and picket outside of a job which shut down operations. This tactic did not work at first because there were plenty of workers to fill the jobs. However, when immigration slowed the tactic had more impact with no people to fill the jobs. Some strikes were so large they brought the attention of police forces and the government.