U.S. imports and exports declined, creating less world trade.
Answer: Option 3.
<u>Explanation:</u>
The Smooth Hawley act was the that aimed at increasing the import tariff of the United States of America. The import tariff because of this act were increased from forty percent to forty eight percent for about nine hundred goods.
But the result of the act was not what was thought, it back fired. Because of the import tariff, other countries also had put tariff on the goods of the United States and therefore the export of the goods of the United States also decreased along with the decrease in the imports. So the overall impact was decrease in world trade.
Silver was important and needed, it advanced times.
The United States should not have a national bank.