Both the Presidential and Congressional Reconstruction plans required . a.
states to enforce Black Codes
b.
an ironclad oath of allegiance
c.
that the rights of scalawags be protected
d.
the abolition of slavery

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.