The answer is option 3: The policy was supported by the people of the United States.
The American President Warren Harding's programs of returning the U.S. to normalcy, after the damages of World War I (1914-1918), were very popular among American people, somehow they saw glimpses of hopes of getting through the difficulties.
During his short term in presidency from 1921 to 1923, Harding limited Immigration, reduced taxes (especially for corporations and wealthy individuals), enacted high protective tariffs, aided the growth of business, contributed to America's isolationist policy, created the Bureau of the Budget as the first formal budgetary body, eliminated wartime controls, achieved to negotiate the limitation of the naval arms race and made security agreements in the Pacific area, signed by the United States, Great Britain, Japan, and France.