B) the end of Florida's land boom
Florida land boom of 1920s was Florida's first real-estate buble, which eventually bursted in 1925. The land boom left behind entire new cities such as Coral Gables, Hialeah, Miami Springs, Opa-locka, Miami Shores, and Hollywood. By the time, the Great Depression began in the rest of the nation in 1929, Floridans were already accustomed to economic hardships.