Discover a wealth of knowledge and get your questions answered on IDNLearn.com. Whether your question is simple or complex, our community is here to provide detailed and trustworthy answers quickly and effectively.

Which historical event significantly accelerated the process of European integration and led to the creation of the European Union?
A. The Treaty of Versailles
B. The fall of the Berlin Wall
C. The Maastricht Treaty
D. The Treaty of Rome