I think this would be an unreliable narrator, but I'm not sure.
The excerpt best demontrates that Edna is changing.Victor sees that and has this attitude of begging her not to reveal something important.That is why he goes with her to the car.The main theme in the story is Edna´s awakening, this birth or rebirth is being evident through the attitude of both characters in this excerpt;Edna is self assured, teasing, Victor is pleading secrecy and discretion, something which could not be helped by the time the scene takes place.
I'm pretty sure it is Theme.
Theme is the central topic of the text. passage, story, or anything else. So it may possibly also be the same for the underlying meaning and universal truth...but again, I am not sure.
The answer is A as we see here in this sentence /
“As falls the restful night.” This is setting a mood showing that it is an evening. Or that it is getting late in the day. We can also use the tone of the story to match this as well.
I think it is to take care of him