Concept:The African Economic Community (AEC) Treaty was signed at a summit of African leaders in 1991.
Explanation:The AEC was created to promote economic integration among African states.
Its goals include free trade areas, customs unions, a single market, a central bank, and a common currency.
The idea for this integration started with the 1980 Lagos Plan of Action adopted by the OAU.
This plan was later turned into a formal treaty in June 1991.
That treaty was signed in Abuja, Nigeria, during the 27th Ordinary Session of the Assembly of OAU Heads of State and Government.
Answer:B. Abuja