单项选择题

Which authentication types are allowed with the cisco adu when selecting wpa/wpa2/cckm under the security options?()

A.cisco-leap,eap-fast,eap-peap(gtc),eap-tls
B.cisco-leap,eap-psk,eap-peap(ms-chap v2),eap-tls
C.cisco-leap,eap-fast,eap-peap(ms-chap v2),eap-ttls
D.cisco-leap,eap-md5,eap-peap(gtc),eap-ttls

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