Since the Introduction of the General Agreement on Tariffs and Trade

Since the introduction of the General Agreement on Tariffs and Trade (GATT) in the 1940s,

A) Tariffs and import quotas have increased dramatically
B) Tariffs around the world have fallen from an average of 40% to about 4%
C) Common market treaties have become more difficult to negotiate and enforce
D) The imposition of tariffs has been declared to be "unfair" in most situations
E) Dumping has become a widespread practice between member nations