I thinks it’s either C or D. I’m not sure!
The answer is a telegraph.
Especially known as the creator of the incandescent lamp, Thomas Edison was responsible for several devices important to the trajectory and development of mankind.
<u>One of the earliest inventions that made Thomas Edison famous, the phonograph was the first machine capable of recording and reproducing sounds.
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The telegraph breakthrough occurred while Edison was trying to improve the telegraph transmitter when he realized that the movement of the paper tape through the machine produced a noise that resembled spoken words when played at high speed.
