To prevent a hacker from gaining access to all of a user's accounts, you should:

• A. Use a different password for each account
• B. Use the same password for all accounts
• C. Disable two-factor authentication
• D. Share password with trusted friends

Answer: (A)

Using a different password for each account limits how far a breach can reach. If one password is exposed, the attacker still needs separate credentials for every other site, so access to all accounts isn’t automatic. This containment is especially important because attackers often reuse leaked passwords across sites in credential stuffing attempts. By keeping each login unique, you prevent a single compromised password from opening every door.

To make this practical, use a password manager to generate and store strong, unique passwords for every service. This way you only need to remember one master password, while each account gets its own robust credential. Pairing this with two-factor authentication further strengthens protection, since even a known password wouldn’t be enough without the second factor. Sharing passwords or using the same password across sites would undo these protections, and disabling two-factor authentication would remove a critical security layer.