Which source would be most appropriate for researching the question "How does social media affect personal relationships?”

a blog post discussing the blogger’s large number of followers
a journal article by a psychologist who is studying social media
a social media site showing the process of connecting to other users
a wiki page discussing appropriate interactions on the internet

Ead this excerpt from the introduction to wheels of change by sue macy. imagine a population imprisoned by their very clothing; the stiff corsets, heavy skirts, and voluminous petticoats that made it difficult to take a deep breath, let alone exercise. add to that the laws and social conventions that cemented a man's place as head of the household and holder of the purse strings. how suffocated women must have felt. and how liberated they must have been as they pedaled their wheels toward new horizons. why does the author include this excerpt?