WAEC - Economics (2015 - No. 44)
The abolition of all forms of trade barriers among member countries while maintaining common external tariffs against non members is a feature of a
free trade
custom union
common market
economic union
Explicación
An economic union is an agreement between two or more nations to allow goods, services, money and workers to move over borders freely. The countries may also coordinate social and financial policies to support this common market.