What led to the establishment of hooverviilles

A "Hooverville" was a shanty town built during the Great Depression by the homeless in the United States of America. They were named after Herbert Hoover, who was President of the United States of America during the onset of the Depression and was widely blamed for it.

im pretty sure the answer is b, i hope i < 3

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof