Restrict the flow of immigrants.
<em>Hope this helped!</em>
<em>- Uaiska</em>
 
        
                    
             
        
        
        
Answer:
A russian revolution 
Explanation:
Russia didnt lose ww1 they took alot of losses and backed out to start their communist revolution 
 
        
             
        
        
        
Because there were too many Chinese come to america for build railroad and want to be american citizen
        
             
        
        
        
Significant conversions also occurred beyond the extents of the empire such as that of the Turkic tribes in Central Asia and peoples living in regions south of the Sahara in Africathrough contact with Muslim traders active in the area and Sufi orders.
        
                    
             
        
        
        
Answer:
B. The demand for building materials 
Explanation:
The demand for housing was so high that the cost of rent soared. Because the speculators had inflated the economy, many American who had migrated to Florida could no longer afford to live here. At the same time, the demand for building materials overwhelmed the railway systems that transported them here.