By the 1600's European demand for slaves from Africa was growing because of the... A Growth of the plantation economy in the Americas.
B Need for servants to work in Europe.
C Beginning of the Industrial Revolution in Europe.
D Spread of Islam into West Africa.

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

Which statement describes an important outcome of the congress of vienna? a. napoleon launched his final european military campaigns. b. european states had their borders clearly defined. c. jewish people were given equal right in germanic states d. the slave trade became increasingly important to european economies.

Which subsystem includes the air we breathe