The false statements are:
C. World War I made governments more stable as people became more trusting of their leaders. This statement is false because World War I actually created instability in Europe and led to the collapse of several empires and governments.
F. Italy and Germany had strong democratic traditions prior to the 1920s. This statement is also false. While Italy and Germany had some democratic institutions prior to the 1920s, their political systems were not strong democracies. Italy had a constitutional monarchy, but the king had significant power, and the electoral system was heavily rigged. Germany had a parliamentary system, but the chancellor had significant power and there were limits on suffrage. Both countries experienced significant political instability in the years leading up to World War II.