Why Did the Great Depression Result in So Much Political

Why did the Great Depression result in so much political change in Europe?

A) Industrial and political leaders fled Europe for the United States, creating power vacuums.
B) High unemployment rates pushed most governments to adopt Keynesian
Approaches.
C) The extreme suffering of poverty made people open to Communist systems.
D) Economic crisis exacerbated an already acute sense of political and cultural instability.
E) The League of Nations responded to unequal access to natural resources by once again shifting national borders.