I would definitely say B.) A smile because if you were just staring it may be rude or distracting to the speaker and a smile shows you are listening and absorbing the knowledge
Tom asks Huck to take a shirt from the clothesline which Jim can use as a journal while he is in prison. Huck is surprised, because Jim can't even write.
You have to change the word that underlined to a better sounding word from the side, they have answers for you
I believe the answer is A, I had this same question on a test last year, and I'm pretty sure that's the answer.
