Which of the following statements is true of free trade zones? a. CAFTA-DR is a free trade agreement between the U.S. and Europe that has resulted in greater exports of U.S. beef to Europe. b. NAFTA is a free trade agreement between the U.S., Canada, and Mexico that has reduced illegal migration of Mexicans to the U.S. c. ASEAN is a free trade agreement between the U.S. and a group of South Asian countries that has led to an increase in U.S. outsourcing to countries like India. d. Mercosur is a free trade association of Latin American countries that aims to increase export subsidies and domestic content requirements in each member country