Final answer:
Connecticut, New Hampshire, and Rhode Island, all located in the New England region of the US, were among the original thirteen states. They shared a common religious history influenced by the Puritans and the Congregational Church, and were instrumental in the ratification of the Constitution.
Step-by-step explanation:
Connecticut, New Hampshire, and Rhode Island all have several things in common, most notably their important roles in the history of the United States. Firstly, all three are located in the New England region of the northeastern United States. Secondly, they were all established during the colonial era and were among the original thirteen states that joined the union.
Another commonality they share is the influence of the Congregational Church in the earlier years of these states, as practiced by the seventeenth-century Puritans. For example, Connecticut and New Hampshire were slower to embrace freedom of religion, requiring the public support of Christian churches, as detailed in historical accounts of the New England colonies.
Furthermore, all three states played vital roles in ratifying the Constitution. Specific representatives from these states, such as Wm. Saml. Johnson and Roger Sherman from Connecticut, were instrumental in this process, as shown in various historical records.
Learn more about New England Colonies