Tariffs, particularly the Smoot-Hawley Tariff Act, worsened the Great Depression by decreasing international trade. This led to retaliatory tariffs from other countries, exacerbating the economic downturn. Hence, tariffs were not effective in relieving its effects but rather contributed to its severity. ;
Tariffs, particularly through the Smoot-Hawley Tariff Act, worsened the Great Depression by reducing international trade due to retaliatory tariffs from other countries. This led to higher unemployment and a deeper economic downturn. Hence, the correct answer is C: They worsened it by further decreasing trade.
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