Question

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

Explanation:

Alexander Graham Bell, who had a background in working with the hearing - impaired, was trying to improve the telegraph and develop a device for transmitting speech when he invented the telephone. The other inventions listed were not primarily developed with the intention of helping the hearing - impaired.

Answer:

the telephone