What Was the Result of the Smoot-Hawley Tariff Act

What was the result of the Smoot-Hawley Tariff Act?

A) Lowered tariffs encouraged trade which helped the world climb out of Depression.
B) Lower tariffs flooded the American market with cheap goods.
C) Higher tariffs protected American industry and pulled the U.S.out of depression.
D) Higher tariffs led to a cycle of trade restrictions, deepening the depression.
E) It had no positive or negative effects