Answer:
It meant that you could have a place to live, food to eat, and also some people would be able to travel for free to America. 
Explanation:
 
        
             
        
        
        
Well some rivers in Europe are used to transport goods. Sometime people even travel on them. River also can provide power. 
        
             
        
        
        
Quakers participated in the early fight for human rights because the Quaker religion finds value in all of humanity. Quakerism supports the dignity of people and states that all humans have an "inner light" which comes from God. Therefore, Quakers historically have been very involved in human rights and social justice work more generally because of their faiths grounding in humanism and the value in all of humanity. 
        
             
        
        
        
Your answer would be, Letter Choice (C), Constantine's efforts to rule in church affairs within the Byzantine Empire marked a change in the relationship between the church and government.
Hope that helps!!!! : ) (Answer:  Letter Choice (C), Constantine's efforts to rule in church affairs within the Byzantine Empire marked a change in the relationship between the church and government.).