The answer is Eugene Debs
Islam came to the Southeast Asia, first by the way of Muslim traders along the main trade-route between Asia and the Far East, then was further spread by Sufi orders and finally consolidated by the expansion of the territories of converted rulers and their communities.
The answer is D. A culture mosaic is a unique mix of cultures that coexist with each other in one society.
Since Muslims felt that enslaving non Muslim Mandinka was lawful, Mandinka could have well reasoned enslaving Ayuba, a Muslim, would have been just reciprocal and fair (what goes around, comes around).