How did the invention of the wheel lead to improvements in agricultural production, trade, and transportation?

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.

Arguments supporting and opposing the supreme court decision citizens united v. federal election commission identify two reasons why some supporters of the decision consider it a victory for free speech.

What is political gerrymandering, what does is accomplish, and why might legislators use this tactic in redistricting