In the years leading up to the 1860 presidential election, which of the following included a provision that people of African descent were not US citizens?
0 the Kansas-Nebraska Act
O the federal slavery code
O the Dred Scott decision
O the Republican Party platform

Who ever answers first gets ! trade in the vedic age led to a.the rise of kingdoms because of the importance of controlling land and long-distance travel routes b.the building of an extensive system of roads because of the difficult terrain c.the creation of a large banking class because of the need to exchange different currencies d.the development of a centralized government that controlled the economic decisions of its people