Answer:
D
Explanation:
Due to the size, and expansion of the war, it is very costly.
When saddles were created, it was made possible for camel riders who had caravans to go for much longer and further without resting both them and the camels. This made it possible to reach places quickly and trade more efficiently, which is why the economy developed massively.
As far as none of these describe it precisely I would say A since it was a direct result of the World War I as a mean to prevent future wars and provide forum of political dispute settlement. The idea was further deveoped and evolved into United Nations once it turned out the League was not enough to stop WWII from happening.
I believe the answer is Lincoln because he wrote the emancipation proclamation that had most to do with state rights