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You did not provide the excerpt nor the answers so nobody can answer this.
 
        
             
        
        
        
It was that "Flat land with poor drainage led to salinization from irrigation waters," that was a factor in the decline of Sumer, since this led to a build up of salt in the soil, which greatly reduced agricultural output. 
        
                    
             
        
        
        
He supported The Supreme Court Ruling In Marbury v. Madison ..hope I helped
        
             
        
        
        
The term that generally refers to the number of individuals or resources that one supervisor can manage effectively during an incident would be "<span>b. Span of control," although the effectiveness can vary significantly. </span>