Read the excerpt from The Adventures of Tom Sawyer. Tom contemplated the boy a bit, and said:

“What do you call work?”

“Why, ain’t that work?”

Tom resumed his whitewashing, and answered carelessly:

“Well, maybe it is, and maybe it ain’t. All I know, is, it suits Tom Sawyer.”

How does Tom's insistence that he enjoys whitewashing the fence move the plot forward?

It leads to Ben leaving Tom to go find his other friends.
It causes Ben to want to do the whitewashing.
It causes Ben to leave and go swimming.
It leads to Ben criticizing Tom about his work.