If the “user-interface maximum-vty 0” command is run on a router, which of the following statements is true?
A. A maximum of 5 VTY users can access the router at the same time.
B. No user can log in to the router through Telnet or SSH.
C. A maximum of 15 VTY users can access the router at the same time.
D. A maximum of 4 VTY users can access the router at the same time.