The correct answer here is to establish Germany's war guilt.
With this article, it is established clearly that the war was Germany's fault, and of her allies. Germany accepted this. What all of this means is that now as the both guilty and losing party Germany had to accept things the Allies demanded of her. The Allies had all the power in this negotiations.
It was the first step to England's more democratic government.
Barrages and Dams were built to manage the Euphrates river. I hope this answer helps.
The third option is the correct answer.
