Word that best describes what the founding fathers wanted to create by revising the articles of confederation

The early democratic-republican party believed that the united states

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.

How did southern slaveholders attempt to convince people in the north to support slavery?