D) Increased immigration in industrial areas.
By 1890, production by factories in American had grown eight times larger than what it had been before 1860.  A large part of the workforce came from immigrants coming to the United States and settling in cities, looking for jobs.  Ireland was one example of a country from which many immigrants came, looking for work in America, after the devastation of famine in Ireland (especially from potato crop failures).  
        
                    
             
        
        
        
Answer:
an order by U.S. President Abraham Lincoln to free slaves in 10 states
Explanation:
 
        
                    
             
        
        
        
Vietnam become a single communist nation through the leadership and influence of Who Chi Minh. He embraced communism and he got support from China and Soviet Union to fight the French regime.
Hope this helps you! Brainliest? :)
 
        
                    
             
        
        
        
Answer:
Can u give me brainliest so I can rank up? ill give u free 50 points
Explanation: