Which of the Following Is NOT a Privilege Given to Arab

Which of the following is NOT a privilege given to Arab countries under GAFTA?

A) Preferential treatment is given to the least developing Arab countries.
B) Tariff barriers are to be maintained for technical products.
C) Goods of Arab origin are traded between GAFTA members fully exempted from customs duties.
D) GAFTA members should treat goods imported from each other the same as domestically imported goods.