The only factor which is the reason behind Songhai’s downfall as a powerful empire is the internal struggles between the rulers. Hence, Option C is correct.
What was the Songhai Empire?
Songhai broke away from Mali and surpassed it as the dominant force in West Africa after becoming independent. Both banks of the middle River were inhabited by Songhai communities. In the fifteenth century, they created a state that brought most of western Sudan under one government and gave rise to a magnificent civilization.
After Askia Muhammad's rule, the Songhai Empire started to crumble, and an army of Moroccan soldiers from North Africa invaded Songhai in 1590 in pursuit of wealth. Due to Songhai's bow and arrows outclassing the Moroccans' guns, the Moroccans were victorious despite having fewer warriors.
Thus, Option C is correct.
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