Mrs Berk Gives Extra Credit to Each of His Students

Multiple Choice

Mrs. Berk gives extra credit to each of his students who pick up 5 pieces of trash in the classroom before the bell rings at the end of the day. Despite the fact that most of the students pick up 5 pieces of trash before the end of the day, some students never participate in the cleanup. Which of the following statements explains why some students do not participate in the cleanup at the end of the day.

A) The classroom context is a context in which only some children are reinforced.
B) One reinforcer does not reinforce behavior for every learner.
C) Some students will never produce socially desirable behaviors.
D) When a group of students are reinforced together, the reinforced behavior is acquired more slowly than if the students are reinforced individually.