Which specific actions does President Obama promise to take in Syria? Check all that apply

Why did river valleys most farming impact the lives of neolithic peoples?

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.

Where did khomeini seize power in 1979?