Answer:
It was the ceasefire between the allies and the germans which halted the war while the world leaders discussed how to achieve permanent peace
Explanation:
Most likely D. since nationalism is the support of a certain group and their rights and the monarchy went against this, they rebelled. i kinda remember this question on one of my previous tests but d is most likely!
By inspiring watchers or readers to think about how terribly wrong the Nazis were.