Opinion.
The reason why it is opinion is because it includes words like "greatest" in it, thus being an opinion.
Hope this helped. :)
At the Wesleyan Chapel in Seneca Falls, N.Y., a woman's rights convention–the first ever held in the United States–convenes with almost 200 women in attendance. The convention was organized by Lucretia Mott and Elizabeth Cady Stanton, two abolitionists who met at the 1840 World Anti-Slavery Convention in London.
<u>Answer</u>
This is a bad belief because when stiff controls are put on goods that offer competition with U.S trades, many problems will occur such as hurting of the U.S exports.
<u>Explanation</u>
When tariffs are placed on imports, tariffs will have to be placed on export too. This will result into hurting citizens in the long-run. For example, in the Smoot-Hawley Tariff Act of 1930 where president Hoover raised protective tariffs on imports so as to protect American business, the process backfired a led to more depression because other countries also increased tariffs with affected U.S exports.