How has free trade had different impacts on developing and developed countries? a. it has allowed manufacturers in developing countries to produce and export goods more cheaply, but has increased tariffs on developed countries. b. it has made it difficult for developing countries to compete in the same markets as developed countries without any economic accommodations. c. it has increased job opportunities for workers in developing countries, but also increased the cost of doing business overseas for developed countries. d. it has made it easier for developed countries to import and export goods, but has sometimes led to the exploitation of workers in developing countries.