Concept: The historical rise of the Yoruba people is linked to their early trade relations with European merchants.Explanation:The Yorubas trace their origin to Ile-Ife. They became prominent largely through their active trading with the Portuguese. This trade brought them a large supply of guns. The availability of guns strengthened their military power and regional influence. Therefore, their rise to prominence is directly connected to the gun trade with the Portuguese.Answer: D. their trading in guns with the Portugese