What is the result of configuring the command dotlx system-auth-control on a Cisco Catalyst switch?

What is the result of configuring the command dotlx system-auth-control on a Cisco Catalyst switch?
A . enables the switch to operate as the 802.1X supplicant
B . globally enables 802.1X on the switch
C . globally enables 802.1X and defines ports as 802.1X-capable
D . places the configuration sub-mode into dotix-auth mode, in which you can identify the authentication server parameters

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Answer: B