Ricky's social media account was recently hacked.His bank accounts and email accounts use the same password as his social media account, and within a week, they were also hacked.What could Ricky have used to prevent the original attack from affecting so many accounts?

A) Strong password
B) Password manager
C) Remote lockout
D) Encryption

Ricky could have used a password manager to ensure that he was using unique and strong passwords for each of his accounts. This would have prevented the hackers from accessing his other accounts once they had hacked his social media account. Remote lockout and encryption do not directly address the issue of using the same password for multiple accounts. While a strong password is important, it may be difficult for Ricky to remember multiple strong passwords if he is not using a password manager.