Can someone give me an explanation on what this could mean: The major ideas of philosophers and there effects on the democrative revolutions in england, france, the united states, and latin america! Plz dont fool around, i need help with this for a final, also enjoy free points that im deleting my acc. :)

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.