All of the following provide evidence of NAFTA's success EXCEPT for which example? a. Mexico's GDP per capita rose 24% to over $4,000. b. U.S. FDI in Mexico averaged $12 billion a year, three times what India took in. c. About 1,000 maquiladora factories have closed down in Mexico since 2000. d. U.S. exports to Canada doubled, and U.S. exports to Mexico grew threefold