Answer:
A standing army.
Explanation:
The Treaty of Versailles was very important and was the official end of World War I. This treaty was signed by Germany and the Allied Powers, but is known for being very harsh on Germany.
The Treaty of Versailles extremely angered the Germans, who believed they had just as much to do with World War I as everyone else did. The treaty however, made Germany take full responsibility for the war and gave them harsh guidelines to follow.
Germany had to pay billions of dollars, give up the land they got during World War I to France and the League of Nations, placed heavy restrictions on their military, and other important things. Germany could keep a standing army under the Treaty of Versailles, without breaking the terms.
Massive class inequality. Nobles and Clergymen were, in the French citizen's eyes, wasting money to fuel their lavish life style. They believed the 1% were living off the other 99% and they were right. France had a huge economic downfall after supporting the American Revolution so the citizens thought it unfair that the problem the government caused should be forced on them alone.
President Abraham Lincoln's Ten-Percent-Plan
The silk road was a large part of the expansion and moving of products across Europe. China was able to finally move product and trade post were set up all along the trail. Maro Polo is one of the most known travelers on the Silk Road, your answer is C. Hope it helps!!^-^