Why does the author include the information about the telegraph in paragraph 3?

A.
to closely reflect the definition of social media in the dictionary

B.
to show that the exact origin of social media is still under debate

C.
to demonstrate how social media has changed through the years

D.
to argue that social media has been around longer than the internet

The correct answer is C. The author includes the information about the telegraph in paragraph 3 to demonstrate how social media has changed through the years. By mentioning the telegraph as an early form of social communication, the author is illustrating the development and evolution of social media over time.