Which event in Charlemagne's life happened first, allowing him to take on a leadership role in Europe? O He became king of Saxony. O He became king of the Franks. He became Holy Roman emperor. O He became king of the Lombards. plsss help

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.