Bill Hates to Clean Up After Dinner

Bill hates to clean up after dinner.One night,he volunteers to bathe the dog before cleaning up.When he finishes with the dog and returns to the kitchen,his wife has cleaned everything up for him.Which of the following statements is most likely true?

A) Bill will start cleaning up the kitchen before he bathes the dog.
B) Bill's wife has positively reinforced him for bathing the dog.
C) Bill's wife has negatively reinforced him for bathing the dog.
D) Bill's wife has established bathing the dog as a secondary reinforcer.