The answer is popular sovereignty. Popular sovereignty says that all power lies in the hands of the people.
It would be primarily in a "socialist" economic system that the government controls the businesses that affect most citizens, such as railroads and electrical power, since wealth in this system is largely "redistributed" through the federal system.
The treaty of Versailles blamed the Germans for causing the war, even though it was the Austrians who started the war. The answer is that the allied powers blamed The Empire of Germany.
The principle cause of the war was that those states harbored and supported the actions of pirates against American shipping vessels in the Mediterranean Sea.
1 is true and 2 is false and 3 i dont know sorry i only know for those 2 questions