What happened at the Constitutional Convention?

Why this is the answer

Either official answer works: "The Constitution was written" or "The Founding Fathers wrote the Constitution." Both say the same thing, so use whichever comes out more easily. The convention met in Philadelphia from May to September 1787, and it was called to fix a problem. After the Revolutionary War the country ran under the Articles of Confederation, and the national government they created was not strong enough. States disagreed over trade, taxes and other laws, and leaders such as George Washington, Alexander Hamilton and James Madison came to believe the country needed a new government. Fifty-five delegates came from twelve of the thirteen states; Rhode Island sent no one. Their assignment was to amend the Articles. They decided instead to write a new plan with a stronger national government. They worked for four months in secret, and on September 17, 1787, thirty-nine of them signed the finished Constitution. Signing was not the last step. The thirteen states then had to vote on it, and not everyone in the country wanted it. Madison, Hamilton and John Jay wrote the essays known as the Federalist Papers to argue for passing it, and the essays ran in newspapers across the country. None of that backstory is needed in the interview, since both official answers name only the result, but knowing it makes the result easier to remember. Here is where people get tripped up. The Declaration of Independence, adopted in 1776, was signed in the same room of Independence Hall where the Constitution was later signed. Same building, same room, two different events eleven years apart. Answering "they signed the Declaration of Independence" or "they declared independence" is wrong, however confident it sounds. A cleaner way to keep them apart: in 1776 the colonies broke away from Britain, and in 1787 the states sat down to design the government that would replace the weak one they had.