Concerning U.S.tariff Policy,the Generalized System of Preferences Allows

Concerning U.S.tariff policy,the Generalized System of Preferences allows

A) imports from selected developing to receive preferential tariff treatment
B) imports from all developing countries to receive preferential tariff treatment
C) U.S.exports to selected developing countries to receive preferential tariff treatment
D) U.S.exports to all developing countries to receive preferential tariff treatment