When RADIUS NAC and AAA Override are enabled for a WLC on a Cisco ISE, which two statements about RADIUS NAC are true?

When RADIUS NAC and AAA Override are enabled for a WLC on a Cisco ISE, which two statements about RADIUS NAC are true? (Choose two.)
A. It returns an access-accept and sends the redirection URL for all users.
B. It establishes secure connectivity between the RADIUS server and the Cisco ISE.
C. It allows the Cisco ISE to send a CoA request that indicates when the user is authenticated.
D. It is used for posture assessment, so the Cisco ISE changes the user profile based on posture result.
E. It allows multiple users to authenticate at the same time.