I believe the correct answer is the third one.
I'm pretty sure it was the Louisiana purchase
Answer:
The preamble sets the stage for the Constitution (Archives.gov). It clearly communicates the intentions of the framers and the purpose of the document. The preamble is an introduction to the highest law of the land; it is not the law. It does not define government powers or individual rights
Explanation:
The function of the Preamble is to outline the goals of a united government as originally designed by the Framers. It also explains the purpose of the Constitution. The Preamble also establishes that power of the government comes from the people who live in the country and not from the people who are in power.
First it creates a national government consisting of a legislative, an executive, and a judicial branch, with a system of checks and balances among the three branches. Second, it divides power between the federal government and the states. And third, it protects various individual liberties of American citizens.
