Which of the following lines from the story is an example of indirect characterization?
a. The old lady had not heard him; only Chig had heard.
b. She smiled. She had all her teeth, but they were too perfect to be her own.
c. They had been met at the door by Aunt Rose, GL's wife, and ushered into the living room.
d. Tears now traveled down the lines in her face, but when she spoke, her voice was clear.