What significant event occurred during the constitutional convention?

The correct choice highlights a crucial moment in history: the writing of the Constitution during the constitutional convention. This event was significant because it laid the foundational legal framework for governance, outlining the structure of government, the powers of its branches, and the rights of the citizens.

The constitutional convention took place in 1787 and brought together delegates from various states who debated and formulated what would become the United States Constitution. This document established a federal system of government that balanced power among the legislative, executive, and judicial branches, and it aimed to address the weaknesses of the Articles of Confederation.

The alternative choices reflect important events in American history but do not pertain specifically to what occurred at the constitutional convention. For instance, the Bill of Rights, which encompasses the first ten amendments to the Constitution, was developed after the Constitution was ratified to ensure the protection of individual liberties. The Declaration of Independence, on the other hand, was signed in 1776 and is an entirely different document declaring independence from Britain, while the rejection of a Constitution would imply that there was nothing substantial achieved at the convention, which isn’t true in this historical context.