What event caused these states to ratify the
U. S. Constitution?

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New Hampshire becomes the ninth and last necessary state to ratify the Constitution of the United States, thereby making the document the law of the land. By 1786, defects in the post-Revolutionary War Articles of Confederation were apparent, such as the lack of central authority over foreign and domestic commerce.

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explanation:

answer; ///i believe its (b); ///the president will sign it or veto the check first good luck