"In the late 1800's" is an introductory adverbial prepositional phrase. We can safely ignore it. All it does is modify the verb "were".
The word thoughtless provides a clue to the meaning of insensitive because the defenition of insensitive means showing no feeling or concern about anyones feelings
Imagine not having frens jk HEYYYYYYY
I believe C would be the right option for this question
