Why was slave labor so important to call me of the southern colonies

Plz which of the following provisions of the compromise of 1850 was designed to appeal to slave states? a. congress passed a strict fugitive slave law. b. the slave trade was banned in washington dc. c. texas agreed to give away some of its land so that the territory would be available for future states. d. california was admitted to the union as a free state.

Historians sometimes rely on video recordings in researching past events because

What is the southernmost fort in what is today western ohio? what city is there today