Concept:ECOWAS is a regional economic community that promotes trade and economic integration among West African nations.Explanation:By reducing trade barriers and encouraging the free movement of goods, ECOWAS allows member countries to trade more easily with one another.This opens up a larger regional market for products made within member states.It does not create a common currency or increase colonial allegiance.Thus, its major achievement is expanding the market for regional goods.Answer:D. widened the market for goods produced