In a deployment using standalone access points， clients set up to authenticate with EAP-PEAP orEAP-Cisco Wireless （Cisco-LEAP） cannot authenticate. When you inspect the Failed Attemptsreport on the Cisco Secure ACS，you find this error："Unknown network access server NAS." Which problemmayhave caused this failure？（）

• A、misconfigured IP address of the AAA server on the access point
• B、misconfigured EAP type on the access point
• C、misconfigured IP address of the access point on the AAA server
• D、misconfigured EAP type on the AAA server