【单选题】
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