A. Morocco
B. Mali
C. Mauritania
D. Sudan
🧠 Explanation:
Timbuktu lies in Mali, West Africa, and is historically famous for trade and Islamic scholarship. “City” is a noun; “lies” is a verb indicating location. Alternatives like “town” or “settlement” could be used, but “city” accurately denotes its urban and historical significance. It reflects cultural, educational, and economic importance.