June's Mother Explains That She Needs Help Taking Care of Their

June's mother explains that she needs help taking care of their new puppy.June's current task,which she really dislikes,is taking the garbage out.Her mother says that if June will help take care of the puppy,she will assign another sibling to take out the garbage.June agrees immediately,because she will do anything to get out of emptying the garbage.From a behavioral viewpoint,June's decision is based on

A) classical conditioning.
B) positive reinforcement.
C) negative reinforcement.
D) vicarious reinforcement.