Which of the following choices contains indirect characterization?
a) selma kept her eyes glued to the ground, and if anyone spoke to her, she stared harder into the sidewalk, avoiding eye contact.
b) selma was very shy, and she felt uncomfortable talking to others.
c) selma did not like being in crowds of people, and she felt shy when people spoke to her.
d) selma had long black hair that hung in her face.