Urgent please In order to ratify The Constitution, what document a group of representatives said should be added?

nice pfp. the answer is

Article VII, the final article of the Constitution, required that before the Constitution could become law and a new government could form, the document had to be ratified by nine of the thirteen states. Eleven days after the delegates at the Philadelphia convention approved it, copies of the Constitution were sent to each of the states, which were to hold ratifying conventions to either accept or reject it. This approach to ratificationwas an unusual one.

Explanation:

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

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