Which two statements describe the secure roaming process of a client between APs that are controlled by a Cisco WLC v7.0? (Choose two.)

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A.
determined by client algorithms

B.
determined by the WLC and AP infrastructure

C.
the WLC can only request a client roam using Cisco Compatible Extensions v3 and above

D.
the WLC can only request a client roam using Cisco Compatible Extensions v4 and above

E.
only implemented for VoWLAN

Explanation: