Forbade mechanics, engineers, and others from leaving the country
Except for local wars quieted.
Your answer is "Letter B, Religious differences increased rivalries between nations".
The correct answer of the given question above would be option D. Mansa Musa was able to bring Islamic culture to Mali by bringing Arab scholars and architects to Mali. Mansa Musa is known as the greatest ruler of his time. He was able to increase the Islamic culture in Africa. He was also called the country's architect. Hope this answer helps.