1. Fort Sumter is the correct answer. It marks the beginning of the Civil War as rebel troops attacked the Federal fort.
2. C is the correct answer. From the outset, the South faced an uphill battle as the North was the center of industry and population.
3. B is the correct answer. The blockades came after the declaration of war. It should be said that "State's Rights" is known now as a fake cause of the Civil War pushed by people trying to hide the racist history of the Southern cause.
4. B is largely the answer, although C and D are also reasons. B is the most correct in that the South knew that to win they did not have to conqueror the North but they had to keep the North from conquering them.