While investigating the increased warfare in West Africa between the sixteenth and eighteenth centuries, what do many historians argue is the key factor in increasing warfare at large? (1 point)

• varying local currencies, such as nzimbu shells
• the European firearms sale-enslavement cycle
• dangerous environments along the Bight of Benin
• wars of succession

Many historians argue that the key factor in increasing warfare at large in West Africa between the sixteenth and eighteenth centuries is the European firearms sale-enslavement cycle.