Nobody chooses the rulers. If its through a system of heredity, when the rulers die their children take over.
        
                    
             
        
        
        
According to the Wikipedia, Saladin "was the first sultan of Egypt and Syria and the founder of the Ayyubid dynasty." He was a Sunni Muslim, "who led his military against the Crusader states in the Levant."
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Answer:
Within 90 minutes it was evident to the Hessians that they were outnumbered and escape routes had been cut off; they surrendered. The surprise victory at Trenton was important to the American cause for several reasons: For the first time, Washington's forces had defeated a regular army in the field.
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The reason that printing currency is a delegated power is because, our Nation needs to be able to trade among itself. If two states had different types of currency from one another it would make trade and travel between the states much more difficult as money from FL and NY would likely be different and likewise useless in each of the other states. 
        
             
        
        
        
Because it is the state within the state. Vatican is a state which is governed by the Pope.