Which configuration is needed on R1 to resolve this issue?

Refer to the exhibit.

An engineer receives this error message when trying to access another router in-band from the serial interface connected to the console of R1.

Which configuration is needed on R1 to resolve this issue?
A . R1(config)#line console 0
R1(config-line)# transport preferred ssh
B . R1(config)#line vty 0
R1(config-line)#transport output ssh
C . R1(config)#line console 0
R1(config-line)# transport output ssh
D . R1(config)#line vty 0
R1(config-line)# transport output ssh
R1(config-line)# transport preferred ssh

View Answer

Answer: D