Answer:
B) The sound was hard to sync with the image.
Step-by-step explanation:
The main reason early attempts at matching sound to film, which involved separate recordings played while the film played, did not work was that the sound was hard to synch with the image. This was because the recordings were played on a separate machine and the synchronization of the sound and the image was often difficult to maintain, resulting in a disjointed and unconvincing viewing experience. As a result, the development of synchronized sound and image technology was crucial to the success of the motion picture industry and the rise of "talkies."