Ensuring C) domestic tranquility means ensuring peacefulness or calmness. Domestic tranquility refers to peace to peace at home. It can be applied to family as well as to states. When referring to states domestic tranquility refers to peace kept among states as set out in the Constitution. It includes the federal governments rights to end rebellions and smooth out tensions between states.
Because the North wanted to abolish slavery and the South didn't because they were making some serious money.
The civil war ended slavery.
Jefferson believed that King George was violating "sacred rights of life and liberty... of a people by carrying them into slavery".
This passage was removed later, though.
C) African Americans were an inferior race that did not deserve the same rights and privileges as whites