Concept:Political and economic integration in West Africa faces real practical barriers such as currency differences, unstable governments, and colonial dependency. Religion is not usually a core obstacle.
Explanation:Different West African countries use different currencies, such as the naira, cedi, and franc.
Currency conversion and differing monetary policies slow down regional trade and payments.
Thus, currency is a genuine problem for integration.
Political instability, including coups and conflicts, also disrupts cooperation among member states.
Powerful colonial economic ties keep many West African countries more attached to Europe than to one another.
Religion, however, is a cultural factor and is not generally regarded as a major hindrance to political and economic integration in the region.
So, the option that is not a problem is religion.
Answer:D. religion