The answer would be C because the narrator is not an active person in the story.
In this sentence the correct answer is A. work on
I hope I've helped!
Blanche, by retreating into hysteria and madness, and by refusing to acknowledge her sister as she leaves the apartment with the doctor, may be sparing Stella the horror of having to face the truth about her husband. Blanche's descent into madness shields Stella from the truth.