What significant event took place at the Constitutional Convention?

The significant event that took place at the Constitutional Convention was the writing of the Constitution. This gathering, which occurred in Philadelphia in 1787, brought together delegates from various states with the primary goal of addressing the weaknesses of the Articles of Confederation. Over the course of the convention, these delegates debated, negotiated, and ultimately drafted the framework for the new government, leading to the creation of the U.S. Constitution. This document established the structure of the federal government, outlined the separation of powers, and laid the groundwork for the rights of citizens.

The other options refer to important events in American history, but they did not occur at the Constitutional Convention. The Declaration of Independence was signed in 1776, a separate event that marked the colonies' break from British rule. The Bill of Rights, which consists of the first ten amendments to the Constitution, was proposed afterward in 1789 and ratified in 1791, well after the Constitution itself was written. Lastly, the Articles of Confederation were established earlier in 1781 and were the governing document prior to the adoption of the Constitution, making their ratification unrelated to the discussions that took place at the Constitutional Convention.