In which year was the Constitutional Convention held?

The Constitutional Convention was held in 1787, which is the correct answer. This significant event took place in Philadelphia, Pennsylvania, where delegates from the thirteen original states gathered to address the weaknesses of the Articles of Confederation and to draft a new governing document for the United States. The outcome of this convention was the United States Constitution, which established the framework for the federal government and remains the supreme law of the land today.

The other years provided in the choices are significant in American history but do not pertain to the Constitutional Convention. In 1776, the Declaration of Independence was adopted, marking the colonies' break from British rule. The year 1791 saw the ratification of the Bill of Rights, the first ten amendments to the Constitution that guarantee individual liberties. Finally, 1803 is known for the Louisiana Purchase, which significantly expanded U.S. territory but was unrelated to the Constitutional Convention.