Question

which of these inventions arose from an attempt to help hearing - impaired people?
○ the multiplex telegraph
○ the telephone
○ the phonograph
○ the motion - picture machine

Explanation:

The phonograph was invented by Thomas Edison with an initial attempt to help hearing - impaired people by recording and playing back sound. The multiplex telegraph was for sending multiple messages simultaneously, the telephone was for communication, and the motion - picture machine was for capturing and projecting moving images, none of which were primarily aimed at helping the hearing - impaired.

Answer:

the phonograph