Please see image of the history question i have

The source of wealth for the city-states of the east african coast was trade between the interior of africa and the far east. true false

What was an important consequence of the neolithic revolution? ):

What was one of the most important causes of the russian revolution of 1917? a. the german occupation of russia during world war ii b. the bolsheviks execution of czar nicholas ii and his family c. csar nicholas ii refusal to withdraw from world war 1 d. the policy of ethnic discrimination put in place by the duma