The answer to this question is A. Jet streams
Jet streams are located near the altitude of the upper troposphere. It's a movement of wind that travels from one side of the planet hemisphere to another. The movement of jet streams will bring up different temperature of air which could influence the weather that exist in certain regions.
So that they could get the support of the black slaves that were all over the united states.
"(2) Development of Self-Government in the <span>American Colonies" would be the best heading for the above options, since all took place in the setting in the United Sates. </span>
