Which sentence from R. J. Palacio's Wonder contains an example of direct characterization?

a
Mom sat down in a chair in front of Mr. Tushman's desk, and even though there was another chair right next to hers, I decided to stand beside her.
b
I don't even know what the noises were exactly because I didn't hear them myself, but Via heard and she just started yelling at the kids.
c
I would wish that I could walk down the street without people seeing me and then doing that look-away thing.
d
One of the reasons I grew my hair long last year was that I like how my bangs cover my eyes: it helps me block out the things I don’t want to see.