The option given that does not show the influence of trade in Early West Africa is C) People were isolated by the deserts and there was no trade among them.
Islam was spread by the Arab traders who went across the desert to trade with the West African Empires in gold and salt, amongst other things.
This ensured that there was learning and law much like was practiced by the Arabs who brought them.
In conclusion, option C is correct.
Find out more on trade in early west Africa at https://brainly.com/question/1901051.