Question

How were state constitutions helpful to the writing of the United States Constitution? Most states had learned that having a strong central government was a mistake. The state constitutions contained no guaranteed rights, so the authors of the United States Constitution left them out. The authors of the state constitutions had learned lessons that were useful in writing a new United States Constitution. Small and large states readily agreed on how to set up a national legislative body.

Answer 1

the answer is The authors of the state constitutions had learned lessons that were useful in writing a new United States Constitution.

Answer 2

The correct answer is the third one:  The authors of the state constitutions had learned lessons that were useful in writing a new United States Constitution. Lessons learned in setting up state governments were helpful in setting up the United States government.

The state constitutions created the articles of confederation and it didn't have an executive branch and a judicial branch. The federal government was not allowed by state constitutions to control taxes. These mistakes were made before the US Constitution. So, government officials realize that they needed a stronger federal government.

The Constitution (originally comprising seven articles) delineates the national frame of government. Its articles embody the doctrine of the separation of powers, the concepts of federalism, and establish the procedure subsequently used by the thirteen States to ratify it.