During 1979-80, China established _____ to allow foreigners to create businesses, employ workers, and import goods without duties for processing and re-export purposes. What were these zones called?

Explanation

The correct answer is special economic zones. These zones were created by China in 1979-80 to attract foreign investment by permitting enterprises to hire labor and import goods duty-free for processing and re-export. Other options do not accurately describe the specific zones established during that period.