What impact does the North American Free Trade Agreement have on relations between countries in ...

What impact does the North American Free Trade Agreement have on relations between countries in North America?
 
  A) NAFTA regulates and enforces protections for workers to ensure that they have safe working environments and fair wages.
  B) NAFTA eliminates tariffs and trade restrictions, facilitating export and import between countries in North America.
  C) NAFTA sets up regulations limiting industrial pollution in all three countries, ensuring the costs of manufacturing are similar in each country.
  D) NAFTA eliminates trade restrictions on products from embargoed countries.