Why did secessionists believe they had the right to leave the union

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism