What was one of the biggest problems that roosevelt inherited when he first took office?

Why did some states believe they had the power to overturn federal laws?

From which of the following literary works is this quotation most likely taken?

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.