Passing laws by a majority rather than unanimous vote, would cause the southern states to be overruled by the northern states Is this anti-federalist or federalist side?

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.