What led to the truman doctrine and containment? what pattern of foreign policy did the doctrine establish?

What was the result on the u.s. economy because of the major changes in atlantic shipping prior to and during the war of 1812?

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.

Which is not characteristic of capitalism? a) market e-commerce b) supply and demand c) freedom of competition d) a society without social classes