This was caused by the bubonic plague also known as the 'black death'.Disease from flies that were on rats cause the population to wipe out.
        
             
        
        
        
Answer:
In the case Plessy v. Ferguson, the Supreme Court determined that segregation was allowed as long as the facilities were "separate but equal." This was overruled with Brown v. Board of Education
With Brown, African-Americans were given civil equality but were still treated as second class citizens and were thus not socially equal. So, social equality is how people actually treat each other while political equality is how they are treated by the law. 
 
        
             
        
        
        
Should be the second answer (b)
        
             
        
        
        
The first nationwide strike in 1877 was the Great Railroad Strike.
Hope this helps you, have a BLESSED and wonderful day, as well as a safe one!
-Cutiepatutie ☺❀❤
 
        
             
        
        
        
Answer:
Checks and Balances
Explanation:
Checks and balances allows other form of governments or branches to check on other governments or branches to see if they are doing what they are supposed to do