Answer:
The answer is from a website
Explanation:
Another major reason that led to the rapid spread of Islam in West Africa was the trans-Saharan trade network. From the seventh century onwards, Muslim traders from the Maghreb and the Sahara started settling first in some of the market centres in the Sahel and then in the Savanna areas.
Although European powers led to the decline of the Umarian state and the Sokoto Caliphate, colonial rule did little to stop the spread of Islam in West Africa. The British used anti-slavery rhetoric as they began their conquest of the Sokoto Caliphate in 1897