Answer:
Option B.
Step-by-step explanation:
Timbuktu, is the right answer.
Timbuktu, a city in the Mali country has great significance as a trading station on the trans-Saharan expedition course and as a hub of Islamic culture. Throughout the 14th century, this city developed as a center for the trans-Saharan salt and gold trade and as a center of Islamic culture. Following its capture by Morocco, the city began to decline by the year 1591.