Answer :
Oooo good question and it was most likely the Telegraph industry
The industry that hurt the most by the spread of electricity and electric lighting include option C: the telegraph industry.
What is the term telegraph industry about?
Telegraph was invented by David Alter in 19th century. Western Union Corporation is considered as the largest telegraph company nowadays.
The telegraph company was mostly affected due to the spreading of electric lights. There consumption and growth would be declined at a rapid rate.
Therefore, the rest of the industries like steel and natural gas does nor affected with electric lighting.
Therefore, correct option is C.
Learn more about industry, refer to the link:
https://brainly.com/question/2839443