What crop did the bantu introduce to central and southern africa?

What industry was exempt from the child-labor laws passed in the factory act of 1833?

Poland a: nato b: warsaw pact c: not a member of either alliance

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.