Mr. Hembre, a seventh-grade teacher, is explaining an assignment. He notices two students passing notes to one another. While continuing to discuss the assignment, he moves toward the students and confiscates the written notes. Then he walks back to the front of the class, still continuing his explanation, and asks Karla, who is daydreaming, to answer a question.
This scenario best illustrates which one of the following classroom management skills?

A. Negative reinforcement
B. Withitness
C. Scaffolding
D. Planning for transitions