In 1979-80 China first created _____ for foreigners to set up enterprises hire labor and import duty-free goods for processing and re-exporting ?

In 1979-80 China first created _____ for foreigners to set up enterprises hire labor and import duty-free goods for processing and re-exporting ?

A. special economic zones
B. liberalized trade monopoly zones
C. Economic Union zones
D. Communist free trade areas