Which best describes timbuktu and its importance to the mali empire?

style of islamic architecture
center of learning and trade
founder of the kingdom
largest mosque built to date

Correct answer choice is :

The Mali Empire was a realm in West Africa from 1230 to 1670. The empire was established by Sundiata Keita and became notable for the wealth of its rulers, particularly Musa Keita. Timbuktu is best remembered for its memorable Djinguereber Mosque and prestigious Sankore University, both of which were built in the early 1300s under the reign of the Mali Empire, the most popular ruler, Mansa Musa.

it's no easy i swear it's hard

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"the land of the dead"