Could World War II have been prevented

How were the european systems of mercantilism and capitalism similar during the 18th and 19th century

Which of these did the soviet union do in 1961? it built a wall through berlin to keep people from moving to the west. it used force to destroy a wall the united states had built in berlin. it convinced the british and french to merge their zones in berlin with the soviet zone. it threatened to bomb berlin if the united states did not leave within 30 days.

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