Although Meant to Protect the Interests of American Farmers, How

Although meant to protect the interests of American farmers, how did the Smoot-Hawley Tariff hurt the global economy?

A) Other nations raised their own tariffs, which caused world trade to decline sharply.
B) Increased demand for American farm products by foreign markets put too much stress on American farm production and caused farmers to go bankrupt.
C) The tariff lowered the prices of American agricultural products, which caused a loss of profits for farmers.
D) The cheaper price of American farm goods caused overbuying by foreign markets, which were unable to sell them, thus causing American farmers to lose money.