James Is in Group Therapy, He Is Having a Hard

James is in group therapy, he is having a hard time being quiet during the groups, often interrupting others, and tapping his feet loudly.Mary, the group provider, praises another child, Tom, for sitting quietly and being respectful of all the other group members.James then stops tapping his feet and Mary also says thank you to him.Mary is using ______.

A) differential attention techniques
B) positive reinforcement
C) deflection techniques
D) reinforcement techniques