In the middle ages which two regions were connected by the salt road

Salt was produced near Lüneburg, a city in the northern central part of Germany. It was then transported to Lübeck, a major seaport in north east of Germany (on the Baltic Coast).

mining and farming towns developed

hope this

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.