In the mid-1800s, one result of manifest destiny was that

a. the northern boundary of the united states was set at 54°40’.
b. the united states and great britain went to war in 1846.
c. the nation elected a president who was a member of the whig party.
d. the traditional american indian way of life was threatened.

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.