Which document outlines the rights of American citizens?

The Constitution is the foundational document that outlines the rights of American citizens. Specifically, the Bill of Rights, which is the first ten amendments to the Constitution, enumerates essential rights such as the freedom of speech, religion, and the right to bear arms. These amendments were added to ensure the protection of individual liberties against potential government overreach.

The Constitution serves not only as a blueprint for the structure of the government but also as a safeguard for the personal freedoms of individuals. The emphasis on civil rights and liberties within the Constitution distinguishes it as the primary source of citizens' rights in the United States. This central role in defining and protecting rights is a key reason why it is the correct answer to the question regarding which document outlines American citizens' rights.

The other choices, while historically significant, do not primarily serve this purpose. The Magna Carta laid the groundwork for the concept of individual rights but is not a document detailing American citizens' rights specifically. The Articles of Confederation focused more on the organization of government than on individual rights. The Emancipation Proclamation, issued during the Civil War, was a powerful statement for freedom but did not serve as a comprehensive outline of rights for all citizens.