See this is what i think about all this mess. It was a really technical question, which probably wasnt helped by textbooks diagrams e.g. dixon.
anyways the way i see it is
- NAFTA is definetly a multilateral agreement
- WTO is a bit confused about what it actually is
however, if you look at the WTO this way i think it will help clear it up. WTO facilitates multilateral negotiations between countries, however at then end of these negotiations there isnt an agreement called WTO agreement that they just add stuff too. (EDIT: wait after reading all the posts there actually is an WTO agreement who would have guessed. BUT STILL, i think that the point to be made is, if you were actually reffering to the WTO agreement, you would say WTOA not WTO - otherwise how would you distinguish between the two)
Instead i view that the General Agreement on Tariffs and Trade is actualy the agreement from which the WTO is founded upon. so the WTO is actually a body created by an agreement (GATT) to promote multilateral trade negotiation
so TECHNICALLY, if the question had the options of
- NAFTA
- GATT
then either would be correct
- but the WTO is not an agreement
anyways thats how i see it, hope it helps someone