When using FortiPresence as a captive portal, which two types of public authentication services can be used to access guest Wi-Fi? (Choose two.)

When using FortiPresence as a captive portal, which two types of public authentication services can be used to access guest Wi-Fi? (Choose two.)
A . Hardware security token authentication
B . Short message service authentication
C . Software security token authentication
D . Social networks authentication

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Answer: BD