The Great Depression of () to () shook the U.S. and the whole capitalist world to its foundations.

A. natural conservation
B. the construction of irrigation projects
C. the setting-up of the Federal Reserve Board and twelve Federal Reserve Banks
D. the introduction of tariff increase and a low income tax

A. stop bank failures
B. prevent radical actions in the United States
C. prevent the further worsening of the economic situation and lessen the personal sufferings of the people
D. prevent further worsening of the unstable political situation