When lincoln was elected president in 1860, his views on slavery were already known and included: select all that apply

In the confederate states of america, the government could not overrule the decisions of state course. what happened to the states when they had conflicts?

According to some historians which marks at the beginning of the us civil war

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.