Which of the following is not recommended regarding passwords?

All of the mentioned practices regarding passwords are not recommended for security reasons. Sharing passwords with colleagues can lead to unauthorized access and security breaches, as it increases the risk of the password being misused or falling into the wrong hands. Using simple combinations makes passwords easier to guess, making it far more likely that unauthorized individuals can access sensitive information or accounts. Writing passwords down in easily accessible places can also compromise security, as it allows anyone who finds the note to have immediate access to the accounts without needing any additional authentication. Therefore, choosing "all of the above" is correct because each option presents a practice that undermines password security.