Why did the mali kingdoms decline

Explanation:

After the death of the military and political leader Mansa Musa, his heir argued over who would be the next ruler. This made the empire to have weaken greatly. Timbuktu was  raided and burned during the time.

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.

the answer is c. hope is