The correct answer is B - poverty.
The answer is B, had this question and got it right.
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.
B) Nebuchadnezzar II is believed to have built the Hanging Gardens of Babylon. The Hanging Gardens of Babylon are considered one of the Seven Wonders of the Ancient World.