What document announced our independence from Great Britain?

The document that announced our independence from Great Britain is the Declaration of Independence. This historic document, primarily authored by Thomas Jefferson and adopted by the Second Continental Congress on July 4, 1776, formally declared the thirteen American colonies to be free and independent states, no longer under British rule. It articulates the colonies' grievances against King George III and emphasizes the principles of individual rights and self-governance, which are foundational to American democracy.

The other options relate to important documents in U.S. history but are not focused on declaring independence. The Constitution is the framework of the U.S. government established in 1787, the Articles of Confederation were the first governing document for the United States, emphasizing a union of the states during the war for independence, and the Bill of Rights comprises the first ten amendments to the Constitution, securing individual rights and liberties but coming into play many years after independence was declared.