The answer is A. Good luck!
they all just say there and watches tv
Although the great depression was an economic crisis and WW2 was a geopolitical crisis, both had SOME of their roots in the same cause i.e. WW1. ... This caused the collapse of Germany industry = led directly to Hitler's rise to power also evoked by the rise of economic crisis like inflation and unemployment.
The answer is New inventions, Political Change, and the end to the feudal system.