The Fundamental Principles of the GATT Specify That, Among Other

The fundamental principles of the GATT specify that, among other things:

A) countries commit to keeping their tariffs below explicit limits.
B) if trade is to be restricted, countries should use quotas rather than tariffs or other less visible trade barriers.
C) signatories of the agreement agree to give all nations, whether signatories to the GATT or not, most favored nation (MFN) treatment.
D) countries may discriminate in favor of neighboring countries.