What terminal line command can you enter to prevent a router from attempting a Telnet connection in response to an incorrect host name entry at the EXEC prompt?

What terminal line command can you enter to prevent a router from attempting a Telnet connection in response to an incorrect host name entry at the EXEC prompt?
A . Transport preferred none
B . Transport output none
C . No ip domain-lookup
D . Transport input none
E . Logging synchronous

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Answer: A