Both of them were Americans with lots of money and philanthropists
Explanation:
Separate but equal was a legal doctrine in United States constitutional law, according to which racial segregation did not necessarily violate the Fourteenth Amendment to the United States Constitution, which guaranteed "equal protection" under the law to all people.
The Pearl of Africa and the city of Mansa Musa is Timbuktu! (answer c)
Timbuktu is best known as a historical town, although it´s still inhabited - by 50 000 people. It had its golden times in 14th and 15th centuries when it was the capital of teh Mali Empire.
From my notes the answer would be that he oversaw the end of slavery in Brazil. I hope this helped.