HELPHELP The single biggest invention, perfected during the Song Dynasty of china, that changed the world, for better or worse, was the use of .

A. Sword fighting

B. Fishing

C. Gunpowder

D. Agriculture

Congress could only request money and had no power to tax; each state made its own money; there was no national court system. which one of these weaknesses do you believe was the most important to correct?