Answer:
The answer is letter C, U.S. imports and exports declined, creating less world trade.
Step-by-step explanation:
The "Smoot-Hawley Tariff Act" was meant to help the farmers when the Great Depression happened. Thus, it tried to increase the tax collected from both its import (import duties) on foreign countries.
As a result, the foreign countries increased their tariffs on American goods as well. The decision clearly strained many countries' economies. So, this resulted to a decline in both the imports and exports of the USA, leading to an even further decline in international/world trade. Because of this, the Great Depression became worst.
Thus, this explains the answer.