Final answer:
The most likely scenario to cause overjustification for Laurence working the late shift at the restaurant is if he is offered an additional bonus, undermining his intrinsic motivation.
Step-by-step explanation:
If Laurence were to work the late shift, the scenario most likely to result in overjustification is B) Laurence is paid an additional bonus for working late. Overjustification occurs when an external incentive like a bonus diminishes a person's intrinsic motivation to perform an activity that they originally found inherently rewarding. If Laurence enjoys his job at the restaurant for its own sake and is then offered a financial reward to work hours that conflict with his plans, this could lead to him viewing his job as less enjoyable and more of a chore. Consequently, the enjoyment he derives from his job may decrease because his motivation has shifted from intrinsic enjoyment to external compensation.