Final answer:
The Treaty of Versailles mandated Germany to make reparations to the Allied Powers and imposed severe military restrictions, contributing to the country's instability and the rise of Adolf Hitler. Georges Clemenceau was a key figure in demanding these reparations, but the treaty did not demand Germany to join the League of Nations as part of these reparations.
Step-by-step explanation:
Treaty of Versailles and German Reparations
At the conclusion of World War I, the Treaty of Versailles imposed several demands on Germany as part of the peace settlement. One of the major aspects was the requirement for Germany to make reparations to the Allied Powers, which was significantly influenced by France's Prime Minister, Georges Clemenceau. The financial burden was enormous, with Germany agreeing to pay over $33 billion. Alongside this, they were mandated to accept the blame for the war through the 'war guilt clause' and surrender territories such as Alsace-Lorraine to France. Furthermore, Germany had to significantly reduce its military capabilities, capping the army at 100,000 soldiers and limiting its navy and airforce. The loss of German colonies and restrictions on military power contributed to the fracturing of the German state and the subsequent rise of extremist movements such as the Nazi party led by Adolf Hitler.
The options provided in the question relate to different aspects of the Treaty and its consequences. Specifically, Germany was not demanded to join the League of Nations as part of the reparations, although it did later join, nor was it forced to provide men to rebuild or give up land it 'had seized,' but rather land that had been contested or colonized prior to the war. The most fitting answer to the question appears to be D. give up land it had seized, with reference to territories such as Alsace-Lorraine.