What is the purpose of the U.S. Constitution?

The purpose of the U.S. Constitution is to provide a framework for government, outlining the structure, powers, and limitations of the various branches of government. It serves as the supreme law of the land, establishing the foundational principles on which the federal government operates, including checks and balances among the executive, legislative, and judicial branches. This framework is essential for maintaining order, protecting individual rights, and ensuring that the government functions effectively within the rule of law.

While declaring war is a power assigned to Congress, allocating resources often falls under government operations but is not a primary purpose of the Constitution itself. Additionally, granting citizenship is regulated by law but not explicitly stated as a constitutional purpose. Therefore, the correct answer reflects the Constitution's vital role in setting up the governing structure of the United States.