A system administrator installed a new switch using a script to configure it. IP connectivity was tested using pings to SwitchB.Later attempts to access NewSwitch using Telnet from SwitchA faileD.Which statement is true?（）

• A、Executing password recovery is required.
• B、The virtual terminal lines are misconfigured.
• C、Use Telnet to connect to RouterA and then to NewSwitch to correct the error.
• D、Power cycle of NewSwitch will return it to a default configuration.