B. You don’t use a coma after because in this sentence.
Answer: Realism focused on the truthful treatment of the common, average, everyday life.
Explanation: Realism focuses on the immediate, the here and now, the specific actions and their verifiable consequences. Realism seeks a one-to-one relationship between representation and the subject. This form is also known as mimesis.
I believe that the last option (As for this city's government, I don't want to say much, except that it is a shame – a shame; but if I should live twenty-five years longer . . . I think I'll see women handle the ballot.) correctly uses ellipsis to shorten Mark Twain’s words from the speech “Votes for Women”. I think that this answer looks most sensible and shows the main idea of the speech in the right form. The answer to your question is D. I hope that this is the answer that you were looking for and it has helped you.