The correct answer is C) the Hawley-Smoot Tariff discouraged foreign companies from purchasing American.
The U.S. experience a decline in exports just as the market collapsed because the Hawley-Smoot Tariff discouraged foreign companies from purchasing American.
In times of a harsh economic situation in the United States due to the Great Depression, the Hawley-Smoot Tariff of March 13, 1930, was protectionist legislation created to protect trade, raising tariffs of all the imports. Of course, it made these gods prohibitive to the people that were suffering from lack of jobs and poverty. The counterpárt of this legislation was that those foreign countries refused to buy products from the United States, making the situation worse.