How do you configure the Security Policy to provide user access to the Captive Portal through an external (Internet) interface?

How do you configure the Security Policy to provide user access to the Captive Portal through an external (Internet) interface?

A.
Change the Identity Awareness settings under Global Properties to allow Captive Portal access on all interfaces.

B.
Change the Identity Awareness settings under Global Properties to allow Captive Portal access for an external interface.

C.
Change the gateway settings to allow Captive Portal access via an external interface.

D.
No action is necessary. This access is available by default.