A network administrator has configured access list 172 to prevent Telnet and ICMP traffic from reaching a server with the address if 192.168.13.26. Which command can the administrator issue to verify that the access list is working properly?（）

A、Router# ping 192.168.13.26

B、Router# debug access-list 172

C、Router# show open ports 192.168.13.26

D、Router# show access-list

E、Router# show ip interface

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