The correct answer is C) it increased the speed that news traveled across the United States.
One important effect of the development of the telegraph was that it increased the speed that news traveled across the United States.
The telegraph was an invention that changed the way people communicate in those years. Invented by Samuel Morse (1791-1972) in 1830, the telegraph facilitated long-distance communication by sending electrical signals using wires in many different stations across the country. Samuel Morse also developed the "Morse Code" using dots and dashes to deliver messages in the fastest way.