These concepts greatly influenced later ideas about separation of powers ... Checks and balances operate throughout the U.S. government, as each ... Once Congress has passed a bill, the president has the power to veto that bill.
It was Kansas. Underlying it all was his desire to build a transcontinental railroad to go through Chicago. The Kansas-Nebraska Act allowed each territory to decide the issue of slavery on the basis of popular sovereignty.
If there was a graph, it would be more helpful, but I believe the answer would be A. If you could provide the graph, I would correct myself if I am mistaken.
