Frannie is a farmer who raises corn as his main cash crop. Recently, domestic corn sales in the United States have hit an all-time low, and Frannie's business is really struggling. Most corn is being imported from Mexico, and local farmers like Frannie cannot compete with the low prices. Frannie and other farmers ask for governmental help with this problem. One way that the government can address the problem and help American farmers is to: impose a tariff on the sale of corn from Mexico. prohibit all trade with Mexico. prohibit all corn sales from Mexico. nothing; the government cannot interfere with free trade