The United States of America has changed through time, so has done the world. The Bill of Rights written during the XVIII century, added to the Constitution specific personal freedoms and rights reserved for each State, that are still followed.
Despite the fact that some decisions may raise unease among people, the whole society respects each state freedom. The best current example that can be given here is the abortion law that is treated differently depending on the State.
I'm not 100% sure but it could be: Voluntary Exchange takes place between buyers and sellers:
(btw I copied and pasted from the question so I didn't take any content :D)
D) the lines are parallel and measure the distance North and south of the equator.
