Read the excerpt from Wonder by R. J. Palacio. I walked toward Jack and followed him out of the auditorium. He held the double doors open for me, and as I passed by, he looked at me right in the face, kind of daring me to look back at him, which I did. Then I actually smiled. I don't know. Sometimes when I have the feeling like I'm almost crying, it can turn into an almost-laughing feeling. And that must have been the feeling I was having then, because I smiled, almost like I was going to giggle. The thing is, because of the way my face is, people who don't know me very well don't always get that I'm smiling. My mouth doesn't go up at the corners the way other people's mouths do. It just goes straight across my face. But somehow Jack Will got that I had smiled at him. And he smiled back.

Which detail best helps readers create a mental picture of August?

Jack Will understands that August has smiled at him.
Jack Will looks August right in the face.
August’s mouth goes straight across when he smiles.
August has a feeling of almost-laughing, and then he smiles.