Which of the following contributed greatly to the fall of the Song Dynasty?

Question

anonymous · Answer

the invention of gunpowder   
   

 
 

  

  B. 
  the increase in the Chinese population   
   

 
 

  

  C. 
  the improvement of the civil service system   
   

 
 

  

  D. 
  the vulnerability to invaders from the north  
 heres the answers

ashleyisakitty · Answer

D) is the correct answer.
The Song Dynasty fell people of Jurchen overthrew north China. After the overthrow of the Song Dynasty, the Jurchen's went to create the Jin Dynasty in the North.

anonymous · Answer

I got one more question that I don't get