Between 1988 and 1994, PRI presidents introduced a series of reforms to liberalize the economy to end the country's traditional import substitution industrialization policy. Which of the following was NOT such a reform?

a. The privatization of many state enterprises
b. Deregulation of the private sector
c. The division of ejidos into individually owned plots of land
d. Mexican membership in NAFTA
e. The strengthening of Mexican federal system to give more authority to Mexico's traditionally weak central government to promote economic development

e