Why was the constitutional convention called? a.) delegates needed to choose a president. b.) delegates wanted to name a chief justice. c.) the country needed a stronger central government. d.) the country was on the brink of another 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.