Which practice is most effective for protecting your online accounts from unauthorized access, even if your password is stolen?

✓ Correct Answer: Option B

Two-factor authentication (2FA) adds an extra layer of security beyond just a password. Even if a cybercriminal steals your password, they would still need a second factor (like a code sent to your phone or a fingerprint) to access your account, making it significantly harder for them to gain unauthorized entry.