<span>The answer is letter A. Spain placed a heavy-tariff on American-made goods. This occurred after the signing of the Second Treaty of Paris in 1783 that marked the end of the American Revolution. Spain was the main colonizers of the Louisiana and Texas states during those days and they were blocking the mouth of Mississippi to foreigners preventing them to sell their crops. Guns and ammunition were also sold to native Americans that were part of this colonization and tariffs were implemented highly to prevent further selling of goods and for Spain to fully monopolize the trade industry. </span><span><span> </span></span>
It was "(D) Passage of antitrust legislation" that was not a result of the Haymarket Square riot of <span>1886, since these protests had to do with creating safer and fairer working environments--such as setting an eight-hour work day. </span>
