Read the excerpt from "Object Lesson, Part 1." "Hardly. They didn't know you were coming." They had betrayed her, the sick shock in her voice said. "Class, this is Ellery Queen. I don't have to tell you who Mr. Queen is, and how honored we are to have him visit us." There was a gasp, a buzz, a spatter of applause, "Mr. Queen was kind enough to come here today to give us a talk on crime. I didn't know he was going to walk in on one."

This information supports the prediction that

Ellery will influence Miss Carpenter's students.
another crime will take place in Miss Carpenter's classroom.
this will be the last time Miss Carpenter asks Ellery for crime-solving help.
Miss Carpenter will be determined to address her students' criminal behavior.