Final answer:
Using public Wi-Fi for sensitive transactions is not considered a best practice for privacy and security; instead, regularly updating passwords, enabling two-factor authentication, and encrypting sensitive data are recommended.
Step-by-step explanation:
Out of the options provided, using public Wi-Fi for sensitive transactions is not a best practice for privacy and security. It is advised that individuals should protect their credit and debit cards, protect their wallet, and protect their mailbox from theft or unauthorized access. To safeguard online security, practices such as regularly updating passwords, enabling two-factor authentication, and encrypting sensitive data are recommended. One should also use passwords and PINs that cannot be easily guessed, install and use anti-virus software, and notify banks or financial institutions of any change in address or phone number to maintain security. Individuals and organizations need to be aware of online privacy and security, especially as data breaches become more common. Awareness and being proactive can prevent unauthorized access or identity theft.