rail roads were  way to move goods and raw martial on mass. rails roads could move supply faster and over a longer distance than using wagons or boats witch were limited on were they can go.  causing an industrial boom. 
 
        
                    
             
        
        
        
Although there was a plethora of factors preventing African Americans from advancing economically during the 1950s, the most significant was B.)<span> poor educational opportunities</span>.
        
                    
             
        
        
        
Answer:5th to the 15th century. 
Explanation:
The beginning of the Middle Ages (or Medieval Period) is generally assigned to the fall of Rome in 476 AD.
 
        
             
        
        
        
Answer:
He wrote the fundamental orders of Connecticut in 1639.  This set of principles make Connecticut's government more democratic.