A. (Hope this helps you out)
Fort Sumter is best remembered for the Battle of Fort Sumter, where the first shots of the civil war were fired. Once the Confederate States of America took control of Charleston Harbor, they soon aimed costal guns on the fort, and fired.
Answer:
It is not required by the Constitution, though all so far have been members.
The modern world is a very different place from the world that existed 50 years ago. Our knowledge of ourselves and our universe has increased, infrastructures have become globalized and technological developments have revolutionized the way we communicate with each other.