After a recent audit, universal containers was advised to implement Two-factor Authentication for all of...

A is correct because requiring users to provide their RSA token along with their credentials is a form of two-factor authentication. An RSA token is a hardware device thatgenerates a one-time password (OTP) that changes every few seconds. The user needs to enter both their password and the OTP to log in to Salesforce.

D is correct because requiring users to use a biometric reader as well as their password is another form oftwo-factor authentication. A biometric reader is a device that scans a user’s fingerprint, face, iris, or other physical characteristics to verify their identity. The user needs to provide both their password and their biometric data to log in to Salesforce.

B is incorrect because requiring users to supply their email and phone number, which gets validated, is not a form of two-factor authentication. This is a form of identity verification, which is used to confirm that the user owns the email and phone number they provided. However, this does not add an extra layer of protection beyond their password when they log in to Salesforce.

C is incorrect because requiring users to enter a second password after the first authentication is not a form of two-factor authentication. This is a form of single-factor authentication, which only relies on something the user knows (their passwords). This does not increase security against unauthorized account access.