Who invented the telephone and also worked to improve the lives of deaf people? a. andrew carnegie b. thomas edison c. alexander graham bell d. gottlieb daimler

Andrew Carnegie -- "industrialist who led the enormous expansion of the American steel industry in the late 19th century"

Thomas Edison -- invented light bulb 

Alexander Graham Bell -- Invented telephone and worked to improved the lives of deaf people

Gottlieb Daimler -- Engineer