Emory Russell cares for a child, Kyle, who has a pattern of throwing tantrums when Emory asks him to do something. Emory eventually decides that Kyle will have to be retrained to not feel rewarded for his tantrums. He therefore tries not to pay so much attention to Kyle’s defiance and instead rewards him when he cooperates. What strategy is Emory using? 

       A. Redirection   B. Behavior modification   C. Time-out   D. Prosocialization