Which of the author’s specific word choices in the following passage from "The Morning of June 28, 1948, and 'The Lottery'" best impacts the article's tone?

On the morning of June 28, 1948, I walked down to the post office in our little Vermont town to pick up the mail. I was quite casual about it, as I recall - I opened the box, took out a couple of bills and a letter or two, talked to the postmaster for a few minutes, and left, never supposing that is was the last time for months that I would pick up the mail without an active feeling of panic.
(1 point)
Responses

in our little Vermont town
in our little Vermont town

active feeling of panic
active feeling of panic

talked to the postmaster for a few minutes
talked to the postmaster for a few minutes

I opened the box

active feeling of panic