I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
The main items traded were gold and salt. The gold mines of West Africa provided great wealth to West African Empires such as Ghana and Mali. Other items that were commonly traded included ivory, kola nuts, cloth, slaves, metal goods, and beads.
The answer is the luckiest
The correct answer is Project Schedule Planning
The concept of schedule management plan
The schedule management plan basically concerns the time it will take for all stages of a given project to be completed. In this sense, this plan deals directly with the creation and execution of projects.
Answer:

The social boycott is the act of persistently avoiding a person by other members of the society. It is society's collective refusal to engage a person in the normal social and commercial relations. Its goal is to make that individual so uncomfortable that he decides to voluntarily leave the society
Explanation:
