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