Answer:
By the 1400s, China had developed an immense naval exploration capacity and high-level technology, however, they had no interest in the Europe of the Dark Ages, so through that century, China retired into isolation. 
Explanation:
By the 1500´s Europe’s era of exploration and colonization, China has closed itself to the point that building a boat with more than two masts became a capital offense and all oceangoing ships were destroyed.
 
        
             
        
        
        
B. "powers given to the federal gov"
        
             
        
        
        
Answer:
When I look at the flag. I do not just see red, white and blue. I see the blood of my forefathers, I see the white flag of hope, I see the love and strength that gave them voice. I see the courage they had to fight and yet love deeply.  The flag represents American principles, ideas and values. That is what the flag represents to me, cornerstone values. The American flag means to me unity, responsibility, liberty, and appreciation. And I want to show my appreciation to the flag by saying: "Thank you for serving this country! We appreciate you and all you have done for us!"
 
        
             
        
        
        
Genghis Khan is the least important Mongol emperor and the most cruel one.