___ was most popular religion in the commercial centers of west Africa and the Swahili city-states of east Africa. In the sixteenth century the trading city of Timbuktu had a prominent university for this religion.

Kaaba

Explanation:

Islam was the largest religon of Swahili eastern Africa, as it was brought in by Arab traders from Oman, Yemen, Iraq, and more. The term Swahili literally translates to "People or person of the coast" in Arabic. Islam today is the majority religon in Somalia and is a huge minority in Kenya and Tanzania

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.