What did breadlines, Hoovervilles, and the Bonus Army have in common during the Great Depression?

Breadlines, Hoovervilles, and the Bonus Army were all features of the United States during the Great Depression. Due to the crash of the stock market in 1929, many people lost all of their savings and resorted to breadlines and soup kitchens to survive. Hoovervilles also sprang up as people could no longer afford their lavish lifestyles of the 1920s, losing their possessions and homes, instead surviving in makeshift tent cities that were dubbed "Hoovervilles" after President Herbert Hoover, who the American people felt did not do enough to help the conditions caused by the economic ruin happening at the time. Lastly, the Bonus Army was an event that took place in Washington, DC, in which veterans of wars were demanding their bonuses from their services early in order to survive. They camped out outside of government buildings demanding to be heard. The White House ignored them, and eventually the military used bombs and gases against their own veterans to get them out of the city.

Explanation:

d. promised it other land

the answer is a, salt plain