What invention to keep slavery profitable in the south? a. cotton gin b. canals c. telegraph d. steam engine

30 ptsthe type of cloud shown here may produce heavy rainfall. this type of cloud most likely occurs in an area of the sub-saharan that is a) often dry. b) often wet. c) very windy. d) usually cool.

Which piece of legislation granted african americans the right to vote

The 15th amendment to the u.s. constitution, ratified in 1870, deals with what issue? a. prohibition of alcohol b. voting c. declaring war d. free speech