Which statement about the Sui Dynasty is correct?

A.
It's first ruler was Wendi, who unified northern China and seized control of western regions.

B.
It was the last Chinese dynasty to have its imperial capital located at the northern city of Chang'an.

C.
It lasted for more than five hundred years until it was conquered by the forces of Attila the Hun.

D.
It dismantled large portions of the Great Wall to obtain building materials for a network of canals.

Question

Which statement about the Sui Dynasty is correct?  
 
 

 
 

  

  A. 
  It's first ruler was Wendi, who unified northern China and seized control of western regions.   
   

 
 

  

  B. 
  It was the last Chinese dynasty to have its imperial capital located at the northern city of Chang'an.   
   

 
 

  

  C. 
  It lasted for more than five hundred years until it was conquered by the forces of Attila the Hun.   
   

 
 

  

  D. 
  It dismantled large portions of the Great Wall to obtain building materials for a network of canals.

anonymous · Answer

plz help