Among the fundamental principles of the General Agreement on Trade and Tariffs (GATT) is the principle that
A.
countries commit to eliminating all trade barriers.
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 other signatories to the GATT most favored nation (MFN) treatment.
D.
countries can only trade with other members of the GATT.