The reason that Columbus sailed the sea was. 
<span>B. He wanted to prove that the world was round</span>
        
                    
             
        
        
        
Answer:
Before this event, the United States had not declared war.
Explanation:
 
        
                    
             
        
        
        
The idea of democracy began in Greece.
        
                    
             
        
        
        
Oklahoma is the nation's<span> third-</span>largest producer of<span> natural gas, fifth-</span>largest producer of<span> crude oil, and has the second-greatest number of active drilling</span>
        
                    
             
        
        
        
The nation of Cambodia was ruled by the oppressive military regime known as the Khmer Rouge back in the 1960s.