What evidence from "Object Lesson, Part 1" best supports the prediction that Miss Carpenter will continue to risk her job for her students?

She tells Ellery details about her students’ jobs and their lives outside school.
She asks Ellery to talk to her class without seeking her principal’s permission.
She accuses her students of stealing an envelope of money from her desk.
She agrees to spend first period solving a crime as a life lesson for her class.