Final answer:
The likely outcome of including a list of co-workers' annoying off-duty behaviors in a resignation letter is prevent rehire in the same organization.
Step-by-step explanation:
The likely outcome of including a list of co-workers' annoying off-duty behaviors in a resignation letter is prevent rehire in the same organization (C). Including negative comments about co-workers in a resignation letter could damage relationships and create a negative impression. It's important to maintain professionalism when leaving a job and avoid burning bridges.