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

The primary purpose of the U.S. Constitution is to establish the framework of the government and define the rights of the citizens. This foundational document outlines how the government is structured, including the separation of powers among the legislative, executive, and judicial branches, which is essential for preventing any one branch from becoming too powerful. Additionally, the Constitution protects individual rights through the Bill of Rights, ensuring that citizens have fundamental freedoms and liberties.

This comprehensive role means that the Constitution not only dictates the organization and functioning of the government but also serves as a safeguard for civil rights, making it pivotal in the governance and legal framework of the country. While the other choices touch on aspects related to government or civil rights, they do not capture the full scope of the Constitution's purpose like the correct choice does.