A system administrator wants to configure 802.1X on an Ethernet switch to enable access to specific parts of the network based on group memberships.How can the administrator accomplish this goal?（）

A、A.Configure roles based on departments and assign access based on source IP address.

B、B.Configure roles based on the user's manager and assign access based on the user's MAC address

C、C.Configure roles based on group memberships and assign a specific VLAN to the role.

D、D.Configure roles based on RADIUS request attribute and assign a specific VLAN to the role.