Plz help me it’s due tomorrow you have to look at those sources and answer

What is the orthodox interpretation of why the cold war started

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.

In the united states who was to declare war