PLZ HELP I WILL GIVE U BRAINLIST Which Sung dynasty innovation most helped sea trade flourish?

gunpowder
the compass
the Silk Road
the Grand Canal

List of social classes of the shang dynasty in order ?

Hurry what kind of texture will a conglomerate rock have? a. large-grained c. medium-grained b. fine-grained d. coarse-grained select the best answer from the choices provided a b c d

How did african americans the union during the civil war? a. by serving as representatives in congress b. by enlisting in the military to fight c. by organizing massive slave revolts in the south d. by negotiating for peace with the confederacy