Why was the Constitutional Convention called?

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The Constitutional Convention took place from May 14 to September 17, 1787, in Philadelphia, Pennsylvania. The point of the event was decide how America was going to be governed. Although the Convention had been officially called to revise the existing Articles of Confederation, many delegates had much bigger plans.

c is the awnser that best describes the role of the english monarchy in its consitution

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