What is the most important part of the declaration of independence introduction?

These parts of the Declaration of Independence and Constitution are so important because they set the "rules" for which the government must operate. Because government derives from the people, the government must only take on powers which the people authorize (via the Constitution and its amendments)

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

b is correct

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