问题：

[单选] The network administrator is in a campus building distant from Building B. WANRouter is hosting a newly installed WAN link on interface S0/0. The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface. How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner（）。

A . Telnet to WANRouter and execute the command show interfaces S0/0
B . Telnet to WANRouter and execute the command show processes S0/0
C . Telnet to WANRouter and execute the command show running-configuration
D . Telnet to WANRouter and execute the command show controller S0/0
E . Physically examine the cable between WANRouter S0/0 and the DCE
F . Establish a console session on WANRouter and execute the command show interfaces S0/0