The correct answer is B) Hawley-Smoot Tariff.
President Hoover signed the Hawley-Smoot Tariff that led to a reduction in foreign trade, hurting the American economy even more.
The United States Tariff Act of 1930 or the Smoot Hawley, was signed on June 17 by President Hoover. The Act implemented protectionist tariffs to foreign products in order to help the economy of farmers and business. President Hoover wanted to protect American products and American companies from foreign goods during the tough years of the Great Depression. This isolationism practices did not work out well because other countries did the same and imposed other tariffs on the United States.
The other options of the question were a) Social Security Act, c) agreement to join the United Nations and d) Hoover-Pierce Tariff Act