How should the Cisco Secure ACS v4.2 and the Cisco WLC v7.0 be configured to support wireless client authentication?

A.
The WLC configured for RADIUS and the Cisco Secure ACS configured for RADIUS (Cisco Airespace)

B.
The WLC configured for RADIUS and the Cisco Secure ACS configured for RADIUS (IETF)

C.
The WLC configured for TACACS+ and the Cisco Secure ACS configured for TACACS+ (Cisco Airespace)

D.
The WLC configured for TACACS+ and the Cisco Secure ACS configured for TACACS+ (Cisco IOS)

Explanation: