How did the division of labor lead to the development of trade?

In what two ways were the tang and song dynasties of china similar? they jointly built the grand canal. they were economically strong. they had weak military forces. they ruled for about 300 years. they discouraged buddhist ideas.

Was the civil war inevitable? could anything have been done through compromise to stop it, or did it have to happen?

Brainliestttme : ) what economic changes occurred after world war ii? ( economic boom, baby boom, g.i. bill of rights)