The League of Nations was a international organization founded after the Paris Peace Conference, 1919. The League's goals included disarmament, preventing war through collective security, settling disputes between countries through negotiation diplomacy and improving global welfare.
Member: French, Lithuania, Bulgaria, Iraq, Tur...
Founders: Wilson
I followed an oligarchy? is this 6th grade?
<span>C) Russia became the first nation with a communist economic system</span>
The correct answer is option D. "Companies replaced hand-operated brakes with air brakes on trains". The development of air brakes on trains was a significant improvement of railroad safety. Air brakes function much more faster than hand-operated brakes, because hand-operated brakes required that the brakemen turned the brakes in one car and jump to the next to set the brakes on, and so on.