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

A.	It will return an access-accept and send the redirection URL for all users.
B.	It establishes secure connectivity between the RADIUS server and the ISE.
C.	It allows the ISE to send a CoA request that indicates when the user is authenticated.
D.	It is used for posture assessment, so the ISE changes the user profile based on posture result.
E.	It allows multiple users to authenticate at the same time.