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.

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.