What is the most likely cause of this problem?

Refer to the exhibit. An engineer wants to setup a mobility anchor for the Guest WLAN, but does
not see the Anchor IP address listed in the drop-down. What is the most likely cause of this
problem?

A.
The mobility anchor is currently unreachable.

B.
The mobility anchor must also be included in the mobility group of the WLC.

C.
Layer 3 Security must be configured for Web Policy Authentication.

D.
The mobility anchor is attached to another WLAN.

E.
Layer 3 Security must be configured for Web Policy Passthrough.