Signed by Canada, Mexico, and the US, NAFTA created the world’s largest free-trade area. The agreement immediately lifted tariffs on the majority of goods produced by the signatory nations, and it called for the gradual elimination of most of the remaining barriers to cross-border investment and to the movement of goods and services among the three countries. Critics claim that NAFTA has led to job loss in the US due to the prevalence of maquiladoras, which are what? Discuss