The correct answer is "Economic".
The North American Trade Agreement (NAFTA) is an agreement between The United States, Canada, and Mexico which creates a trilateral trade bloc between the countries.
Products traded between these countries would have low tariffs and/or restrictions. This benefits the end consumer, as he has a wider variety of options to chose from while shopping. It also benefits the producers, as they expand their potential market. Finally, the agreement proved to create more jobs, as the demand for products grew due to the increase in trade.
If NAFTA were to be dissolved, the immediate sector that would be affected is Economy, as the income form many companies would be reduced due to the immediate reduction of their markets. This would lead to layoffs and a reduction in overall consumption.