The answer to the question above is the Mali Empire became the world's largest producer of gold and Mansa Musa spread the Islam on Mali Empire.
The effects of Mansa Musa's rule on Mali Empire and West Africa is the Mali Empire became the world's largest producer of gold. He also spread the Islamic religion on Mali Empire and he made a pilgrimage to Mecca.
Martin Van Buren created an efficient state political organization called the Albany Regency.
Personally, i don't think he is.
John Brown Believed that the only way to overthrow the institution of slavery is by doing an armed revolt. We have to aware that in his Era, slavery is very common. Is like owning a dog in this era. He probably tried to convince the slave owners to realize the value of human's dignity no matter what the race is but nobody agrees with his point of view.
Any answer choices? Based off my memory I'm going to say maybe <span>new treatments for patients suffering from tuberculosis and yellow fever</span>