Only once during all those trips did we have any trouble. Some demon boys were out in the street. They stooped as if to pick up things to throw, and Father whispered to me to sit up straight and not show I was afraid. The demon boys called out some things, but we ignored them until we had passed them by. A rock whizzed by my ear and hit Red Rabbit in the side. He snorted, but plodded on as steadily as before. —Dragonwings,
Laurence Yep

Which quote from the passage is an example of indirect characterization?

“Only once during all those trips did we have any trouble.”
“Some demon boys were out in the street.”
“We ignored them until we had passed them by.”
“A rock whizzed by my ear.