Which statement best describes configuring access control lists to control Telnet traffic destined to therouter itself？（）
A. The ACL applied to the vty lines has no in or out option like ACL being applied to an interface.
B. The ACL is applied to the Telnet port with the ip access-group command.
C. The ACL must be applied to each vty line individually.
D. The ACL should be applied to all vty lines in the in direction to prevent an unwanted user from connecting to an unsecured port.
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