B.
Ohio river's largest tributary is Tennessee river.
The colonies were the first in history to declare a completely democratic republic, just before the French did it in the French revolution. Their fight against the monarchy and enlightenment ideals. The American revolution showed that it was possible to stand up to tyranny and inspired many nations in Europe to do the same, just like France did.
John Muir influenced Theodore Roosevelt to set aside 100 million acres as federal forests :)
