Which situation is the BEST example of contingency-shaped behavior?

A task analysis is used to teach Lilly how to clean her room.

Dean is able to change the scale on a computerized graph after reading “how to” instructions.

Billy’s mother tells him not to touch the stove because he could burn himself. Billy does not touch the stove.

Jennifer sees a candy bar and she mands for it. Jennifer’s sister gives her the candy bar and she eats it.