Final answer:
Sharing passwords with colleagues makes Alex's personal information vulnerable to attacks by identity thieves.
Step-by-step explanation:
Out of the options provided, sharing passwords with colleagues makes Alex's personal information vulnerable to attacks by identity thieves. Sharing passwords increases the risk of unauthorized access to Alex's accounts, making it easier for identity thieves to steal personal information or take control of accounts.
It is important to use strong, unique passwords and not share them with anyone in order to protect personal information.
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