Answer:d. reduce trade barriers and promote free trade among member nations.
Step-by-step explanation:
Main objectives of the African Union?
The African Union is a union that unity government leaders of the African nations in order to bridge a gap that exist between African countries and eliminate any boundaries that prevent economically trading .
It aim is to see each African country treat another one as family without any feelings of animosity or segragation towards each other. This can can help promote future development for each African country this forum under AU is able to discuss issue of concern that each country face in Africa and they find similar issue of concern and in return they are able to work collaboratively to protect Africa.
They fight against apartheid and stand together internationally to see their countries develop economically.