Which of the following represents the belief used to justify westward expansion of america's borders in the 1800s?

How did the supreme court decision in the slaughterhouse cause have an affect american business

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?

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.