To manage the wireless network separately, an IT administrator created several virtual domains on the Cisco WCS. APs and

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To manage the wireless network separately, an IT administrator created several virtual domains on the Cisco WCS. APs and WLCs were assigned to these virtual domains. However, when the IT staff logs into the Cisco WCS, they are assigned to the default root domain. The Cisco WCS login request is authenticated by an external RADIUS server. What needs to be configured next to solve this problem?

A. The IT administrator needs to add the correct attribute in the RADIUS server to assign the administrator to the proper virtual domain.
B. The IT administrator needs to add local user accounts in the Cisco WCS.
C. The administrator needs to change to TACACS+ authentication because the virtual domain cannot be assigned via RADIUS authentication.
D. Users need to manually select the proper virtual domain after logging into the root domain.
E. The IT administrator needs to configure the user group settings to map users to the proper virtual domain.