The most accurate evaluation of how NAFTA impacted the economic relationship among the U.S., Mexico, and Canada is:
NAFTA reshaped the economic relationship among the three countries and made them much more enmeshed and interdependent.
This statement reflects the essence of NAFTA's purpose, which was to reduce trade barriers and enhance economic cooperation among the three nations. The agreement led to increased trade and investment between the countries, fostering a more integrated North American economy.