ACCORDING TO THE PASSAGE, HOW WAS THE PHONOGRAPH MADE

4. - DE KIEM TRA HKII ANH 9
DE KIEM TRA HKII ANH 9
4. According to the passage, how was the phonograph made? A. With a telephone needle and a recorder B. From a recording of a telegraph C. With only a telegraph repeater D. From a combination of telephone & telegraph part