Eagle asks his students to line up for recess using the procedure they have just learned. He quickly praises Johnny for pushing in his chair and quietly walking to the door. He tells Sally she is doing a wonderful job waiting patiently in her spot in line. He says, "Thank you for grabbing our equipment!" to the classroom helper who has picked up the basket of playground equipment. He promptly walks to the door and thanks the entire class for pushing in their chairs and lining up quietly at the door. Which principle of Procedures is being used in this scenario?
a. Provide
b. the Rationale
c. Explain Practice
d. Reinforce