Answer: The right answer is the D. It tends a self deprecating sense of humor that makes the narrator credible.
Explanation: Just to elaborate a little on the answer, it can be added that by describing his own house as an "eyesore" and by saying, in a conformist, but also in a sarcastic, tone, that he had "a partial view of my neighbors lawn, and the consoling proximity of millionaires — all for eighty dollars a month," the narrator is in this excerpt employing a self-critical sense of humor that makes him credible and approachable.
