Which events in 1917 caused the United States to enter World War I? Check all that apply.

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

The area directly outside a city is called 1 rural 2 urban 3 suburban

Why is the end of the cold war tied to the american domestic economy during this time?