They were beiing mean people.
        
             
        
        
        
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
What has been the greatest advantage of creating groups like the EEC, EU, and NAFTA?
The greatest advantage of creating groups like the EEC, EU, and NAFTA is that countries can form trade regions or trade "blocks" that benefit their economic interests. These trade agreements allow their members to freely trade with no or minimum tax barriers, benefiting their exportations and importations rate.
Let's put the example of NAFTA.
On December 17, 1992, Presidents of Mexico, the United States, and Canada signed NAFTA. They were Carlos Salinas, George H. W. Bush, and Brian Mulroney. This would be the largest free trade area in the world. The entering President, Bill Clinton, supported NAFTA principles but wanted the addition of some clauses on environment protection and better labor agreements. According to President Clinton, a result of the North America Free Agreement (NAFTA) would be increased jobs and lower prices.
NAFTA has been recently renegotiated by the three countries and the new agreement is called USMCA, United States, Mexico, and Canada Agreement.
 
        
             
        
        
        
 Answer is, King Christian X        
        
             
        
        
        
It was Poland that was a communist state during the Cold War. This was due to the fact that it had fallen under Soviet control after World War II, and the Soviets were communist. 
        
             
        
        
        
Answer:
(See explanation below for further details)
Explanation:
Why did World War II become such an aircraft-dependent war? 
Due to the need of destroying enemy infrastructure without needing the direct presence of infantry, minimizing human losses. 
Why did the Allies have an advantage in the skies?
Since the Allies had a bigger industrial capacity for manufacturing thousands of airplanes in short time and a well-developed logistics to move them to the battlefront and keep them operational.